If Satoshi Nakamoto suddenly appeared, it would have a significant impact on the cryptocurrency world. Here are some potential results:

1. Market Reaction: The price of Bitcoin and other cryptocurrencies may experience significant fluctuations in response to the reemergence of Satoshi Nakamoto. Investors and traders can react to the news by buying or selling their assets.

2. Credibility Boost: Satoshi Nakamoto's return could give the cryptocurrency industry a credibility boost. Many people see Nakamoto as a visionary figure who created Bitcoin with the goal of revolutionizing the financial system.

3. Technical Contributions: If Satoshi Nakamoto re-engages with the cryptocurrency community, they could potentially contribute new ideas, innovations, or improvements to the Bitcoin protocol or other blockchain projects.

4. Legal and Regulatory Issues: Revealing the identity of Satoshi Nakamoto may have legal and regulatory consequences. Governments and regulatory bodies may seek to impose regulations or restrictions on Nakamoto's activities.

5. Community Response: The cryptocurrency community will likely be divided in its response to Satoshi Nakamoto's reemergence. Some may welcome this as a positive development, while others may be skeptical or critical of Nakamoto's intentions.

In summary, the return of Satoshi Nakamoto will be a significant event in the cryptocurrency world and could have far-reaching consequences for the industry as a whole.