BestChange

Older BTC addresses at risk: Bitcoin network upgrade and protection against quantum attacks The crypto community is debating one of the most radical proposals in recent years—a Bitcoin network upgrade that could directly affect holders of older wallets. The proposal outli nes the transition to post-quantum cryptography under BIP-361, designed to prepare the network in advance for the arrival of quantum computers that could target Bitcoin’s current signatures. What Bitcoin developers are proposing ● Phase A disallows sending funds to old, and therefore vulnerable, addresses. The estimated implementation timeline is three years. ● Phase B completely shuts down the current signature algorithms (ECDSA and Schnorr). All legacy wallets that have not been upgraded could lose the ability to spend their funds. This phase is expected to begin two years after Phase A. ● Phase C involves quantum-safe recovery of legacy addresses. One option under consideration is proof of possession through a corresponding seed phrase, although the mechanism has not yet been finalized, and no implementation date has been set. Why is this being discussed now? Developers cite several reasons, including: ● Quantum technologies are advancing faster than expected; ● 34% of BTC is already potentially vulnerable because of exposed public keys; ● A quantum attack could go unnoticed, with stolen funds being moved only later and in small amounts; ● The ecosystem needs time to upgrade, and without a clear deadline, the process could drag on. For now, this is only a proposal; any real implementation remains a long way off. But the very fact that it has emerged suggests that serious preparations are beginning for a new category of risk. And what is your take? Would the proposed upgrade protect the market, or create new problems?

Payment confirmation and exchange delays: how understanding the process saves time and reduces stress A BestChange user created and paid for an order with an exchange service found on our platform. The payment system used by the exchange service did not automatically register the user’s transaction. To complete the exchange, the payment needed to be confirmed manually, so the exchanger requested supporting documents from the user. Expectation: The user clarified which specific details would be suitable to confirm the payment—a bank statement, receipt, the transaction’s RRN (Retrieval Reference Number), payment status, and settlement timeframe—and promptly requested these from their bank. The user then submitted the information to the exchange service. The service identified and confirmed the transaction and completed the exchange within 15 minutes. Processing time: 15 minutes. Reality: ● The user considered the request excessive and refused to provide the information. ● Throughout the day, the user repeatedly contacted both the exchange service and BestChange support, insisting that since the funds had already been debited, the exchange should be completed without additional requirements. ● The exchange service was unable to proceed, as the transaction required manual identification through the payment provider. ● We clarified the situation with the exchange service and confirmed the issue. ● Then, we explained to the user the reasons for the request and the verification procedure, and outlined what information could be provided. We also emphasized that such requests are part of a standard procedure and are handled in accordance with security and confidentiality requirements. ● Only toward the end of the day did the user accept the explanation. Then they submitted the information to the exchange service. The service identified and confirmed the transaction and completed the exchange within 15 minutes. Processing time: 1 business day + 15 minutes Conclusion: Even standard procedures can raise concern when users encounter them for the first time. That is why, in our ‘Case Studies’ series, we break down real scenarios and explain such situations in advance—so your exchanges proceed with a clear understanding of the process, and therefore without unnecessary delays.

We’re continuing to develop our Telegram products—the bot and the mini app. The BestChange bot is super convenient, as it can function even with an unstable Internet connection. With it, you can: ● Choose an exchange direction and check rates; ● Use filters; ● View your Favorites. The bot is available in four languages, plus you can access the mini app directly from it—a handy feature. The BestChange mini app is a great solution for those who are reluctant to install a separate mobile app. With its intuitive interface, everything you need is at hand—currency selection, our smart calculator, exchange service details, and even reviews. A recent update has also introduced several useful features: ● Badges indicating additional verification, official registration, and a high level of service among exchange providers; ● The ability to sort offers by rate, reviews, and other criteria; ● Automatic scrolling to the currency selected in the calculator—a helpful feature if you tapped a wrong currency in the dropdown list or typed it in and want to make a more precise choice; ● Improved display of inactive payment units in the calculator—they are now colored in gray and easier to spot. Have you tried the BestChange bot or the mini app? Share your thoughts in the comments

New exchange units on BestChange We'll keep updating the list of exchange units to reflect market changes and, of course, user preferences. We've recently added: ● Bank Card VND (Vietnamese dong); ● ZEN EUR (payment system); ● Cash SAR (Saudi riyal). And removed: Payeer USD; Payeer EUR; Maker (MKR). As a reminder: our aggregator features over one million exchange rates and nearly 52,000 currency pairs. If you feel a certain exchange unit is still missing, let us know in the comments, and we will consider adding it.

New—and better—terms in the BestChange referral program We’re excited to share the news, so let’s get straight to the point. - First, we have increased the maximum referral reward fivefold. You can now earn up to $5 for every user you refer to BestChange.com. The more you tell your friends, followers, and others about BestChange, the greater your potential earnings. - Second, there is now a new opportunity to earn by introducing users to the benefits of the BestChange AML analyzer and crypto address risk scoring. If a user follows your link and performs a paid AML check, you will receive a percentage of their payment. Your reward will be credited every time the user you referred pays for an address check—indefinitely, provided the system can correctly identify your referrals. - Third, a special promotion is available until June 1, 2026: the referral reward for analyzer users is 30% of the payment. For example: You refer a user → they run a bundle check for $4.50 → $1.35 will be credited to your referral account. Don’t miss the opportunity to earn more! How can you join the BestChange referral program? It’s very simple: ● Read the terms and conditions; ● Fill out a short form; ● Confirm your agreement and click ‘Sign up.’ You will immediately gain access to your referral account, where you’ll find: ● Ready-to-use texts, banners, and other promotional materials; ● A tool for creating your referral links (for example, to the BestChange AML analyzer page); ● Helpful tips for beginners. Join the program and start earning!

A small habit that can save you a lot of trouble When dealing with cryptocurrency, it is always important to understand where the funds come from. Even when acting in good faith, you may end up with assets linked to suspicious transactions in your wallet. This can lead to verifications, transaction delays, or even account restrictions. One simple but very useful habit can significantly reduce these risks: checking a crypto address in advance. You can use the BestChange AML analyzer. Moreover, for greater convenience, it now offers bundle checks across several databases. Bundle checks can help you: ● Gain a clearer understanding of connections with different sources of funds; ● Compare risk scores provided by various systems; ● Identify both overlapping and unique sources of risk. How to check a crypto address Open the Check Address page; Fill out the form; Select one or several services—for the most accurate assessment, we recommend that you use all available options; Complete the payment; Receive a report comparing the results. Remember: exchanging funds without a prior AML check saves only a small amount of time and money. By running a check in advance, however, you protect something far more valuable—your peace of mind and your security.

Do you follow the signs on BestChange? Almost every exchange rate on our website is accompanied by special round signs. We require exchange services to use them to clearly indicate specific features of an offer directly within their offers. These signs may show whether an exchange service operates a physical office or highlight mandatory steps that must be completed before a transaction can proceed. For example, ‘Accepting funds Card2Card’ indicates that the exchange is processed via a direct transfer from the customer’s card to the exchanger’s card. In such cases, the sender’s bank may charge an additional transfer fee. Certain tags indicate that an exchange service uses payment details of a legal entity or an individual entrepreneur, or that funds are sent via a third-party payment system different from the one specified as the primary for the chosen currency pair. These details are important to consider when planning a transaction. There are also warning signs, such as ‘Exchange rate fluctuations detected.’ It is automatically applied to offers that have experienced significant rate volatility in the past 15 minutes. If a user chooses to proceed with an offer marked by this sign, extra caution is strongly advised. In total, BestChange uses around two dozen different tags. We recommend reviewing their meanings on our website and paying close attention to them when searching for suitable rates. Hover your cursor over a sign or click on it to see a detailed explanation.

Smart filters are now available in the BestChange mobile app. Now you can customize your search to match your preferences and find suitable offers faster. With the new filters, you can easily: ● Select only exchangers with brick-and-mortar offices—for example, if you’re exchanging cash; ● Exclude options that involve registration or manual processing—to speed up the exchange; ● Filter out offers with floating rates, and more. You can also use this feature to only see exchangers from your Favorites list—this way, you’ll find offers from services you’ve already used and trust. Just don’t forget to add reliable exchangers to your Favorites.

New exchange units on BestChange Our aggregator features over one million exchange rates and nearly 52,000 currency pairs. With this multitude, changes in the list of exchange units may not always be immediately noticeable. To make it easier for you to navigate, here’s an overview of the latest update. We've recently added: ● Nagad BDT; ● bKash BDT; ● Bank Account BDT; ● Bank Card BRL; ● Bank Card ARS; ● Bank Account ARS; ● Bank Account CZK; ● Bank Account MXN; ● Bank Account UYU. And removed: Payz USD; Paxum USD; WebMoney WMX; Epay EUR; ePayCore USD. We'll keep updating the list of exchange units to reflect market changes and, of course, user demand. If you feel a certain exchange unit is missing, let us know in the comments, and we will consider adding it.

NEW! Bundle AML Checks When it comes to AML, relying on a single data source is not always enough—different services may assess the same crypto address differently. To help you get a complete picture and compare results, we’ve introduced bundle checks in our AML analyzer. Simply put, you can now check a crypto address across multiple AML services at once. How to run a bundle check ● Go to the ‘Check address page. ● Enter the wallet address and the asset you want to check—the list of available analyzers and the total cost will appear below. ● Select the desired analyzers, then click the green ‘Check address’ button. As a result, you’ll receive a consolidated report showing both overlapping and unique risk sources, along with a comparison of Risk Scores across the selected analyzers. If needed, you can also open a detailed report from any individual service. This broader analysis allows you to view a crypto address from different perspectives and make a more balanced risk assessment. Which analyzers should you choose? For maximum effectiveness, we recommend selecting all available services. Each analyzer is unique, with its own databases and risk assessment methodologies. Using multiple analyzers simultaneously increases accuracy and provides the most comprehensive insights. Of course, you can still run a standard check using a single analyzer and receive a detailed report based on that service’s data and algorithms. Try the comprehensive check and share your feedback in the comments—we’ll be happy to hear your thoughts!

New service on the BestChange AML Analyzer We continue to develop our AML capabilities to make crypto asset checks even more accurate and useful. Here’s what it actually means: The BestChange AML Analyzer allows you to check a wide range of crypto assets, and the list keeps growing with each added service. You can also download a free PDF report of your check—convenient for future reference. Most importantly, you can always rely on BestChange support for help interpreting results, understanding the logic behind the checks, and answering other questions. We’ve recently added the sixth service to the AML Analyzer. This new provider uses European data sources and offers near-institutional-level analytics: ● Broad network coverage: BTC, TRON, Ethereum, BNB Chain, Solana, Polygon, Arbitrum, Base, Avalanche C-Chain, Polkadot, Moonbeam, Litecoin, BSV—including tokens on these networks. Extensive address attribution, regular database updates, and professional risk scoring. ● A detailed PDF report: helpful for analytics, compliance, internal audits, and dispute resolution. The report includes an overall risk score and summary, source and destination of funds, direct and indirect connections with counterparties, and key transactions with tx hashes. The BestChange Analyzer does more than check for AML red flags. It is a tool that evolves alongside the market and real user needs, helping prevent a wide range of potential issues. We’d love to hear your feedback on using this tool—feel free to share your experience in the comments.

More rewards with the BestChange referral program We’ve added a new, simple way for you to earn referral bonuses — AML checks. You can now invite users via your referral link directly to the AML Analyzer. If a referred user pays for a single AML check or purchases a voucher for multiple checks, you will receive 30% of the payment amount. The reward is credited to your referral account balance and can be withdrawn under the standard conditions—starting from $1 via electronic currencies: Bitcoin and Volet (USD, EUR). Please note: AML check rewards are credited for users linked to your referral account—that is, users who originally came to the BestChange website via your referral link. The timing does not matter; what matters is that the user was initially referred by you.

BestChange mobile app is now available across 175 countries We started with just a few locations, carefully tested how everything works, and made sure we were ready to take the next step. Now the BestChange app can be downloaded from almost anywhere—via the App Store, Google Play, and AppGallery. Install it and enjoy convenient exchange rate monitoring right on your smartphone. And don’t forget to share your feedback in the comments! Your input helps us improve the app and deliver useful updates.

Route recalculated: how to use the ‘Multistage exchange’ tool Can’t find any options for a direct exchange in your chosen currency pair? Don’t worry—it’s not a dead end. Try building an alternative route with the help of Multistage Exchange. Why is the Multistage exchange useful? This tool helps you find a more complex exchange route via one or several intermediary currencies. In some cases, this alternative path can result in a noticeably better final amount, which is why it’s worth checking even when direct exchange offers are available on BestChange. What should you keep in mind when using the Multistage exchange? A multi-step route usually involves several exchangers. Be sure to carefully review each one—exchange rates, reserves, operating conditions, and user reviews. This will help you avoid unexpected issues and choose the most efficient and reliable option. Have you tried finding the Multistage exchange route? Share your thoughts and experience in the comments.

We don’t store any sensitive information linked to your partner account. In fact, all data is anonymized, so your request to delete something from our database isn’t entirely applicable. We do retain the right to record IP addresses and similar visit information in anonymized form—you didn’t provide any personal data or verify your identity when registering, so there’s simply nothing for us to delete.