While it is difficult to provide an exhaustive list of the top 10 developments in the regulation of cryptocurrency in gambling, here are some significant milestones and trends that have shaped this space:

1. Gambling commissions’ recognition: Various gambling regulators, such as the UK Gambling Commission, Malta Gaming Authority, and Isle of Man Gambling Supervision Commission, have acknowledged the use of cryptocurrencies in the online gambling sector.

2. Licensing and operator regulations: Governments and regulatory bodies have started licensing and regulating cryptocurrency gambling operators to ensure player protection, fair gaming, and responsible gambling practices.

3. KYC/AML requirements: Given the potential for anonymous transactions, Know Your Customer (KYC) and Anti-Money Laundering (AML) regulations have been enforced more strictly to prevent illicit activities and promote transparency in cryptocurrency-based gambling platforms.

4. Integration of blockchain technology: The integration of blockchain technology has gained popularity in the gambling industry, offering benefits such as provably fair gaming, decentralized platforms, and secure payment systems.

5. Cryptocurrency-specific gambling legislation: Some countries, like Malta, have introduced specific legislation tailored to cryptocurrency gambling, establishing a regulatory framework for operators and ensuring consumer protection.

6. Taxation policies: Governments are increasingly addressing the taxation of cryptocurrency gambling activities, defining rules for reporting and payment of taxes on winnings, losses, and revenues generated from cryptocurrency gambling platforms.

7. ICO regulations impacting gambling projects: Initial Coin Offerings (ICOs) have been subject to scrutiny and regulations in many jurisdictions, leading to a more cautious approach in launching tokenized gambling projects.

8. Player protection measures: Regulators have implemented measures to safeguard players’ funds and data in cryptocurrency gambling, including mandatory segregation of player accounts, dispute resolution mechanisms, and security audits.

9. Global cooperation and standardization: Various jurisdictions have engaged in international cooperation and discussions to establish common principles, standards, and best practices to regulate cryptocurrency gambling effectively.

10. Ongoing regulatory evolution: The regulatory landscape for cryptocurrency gambling is continuously evolving, with many governments and regulatory bodies revisiting and adapting their existing frameworks to address the unique challenges and opportunities presented by cryptocurrencies.

Please note that this list is not exhaustive and the developments may vary across jurisdictions. It is always advisable to refer to the specific regulations and guidelines of the targeted region when considering cryptocurrency gambling.