Cryptocurrencies in general will be so broad in their application that attempts to regulate them as a whole will be overly broad, and hurt the countries that attempt it.

More specific regulations will not be seen as effective or beneficial because those will simply single out and impose losses on investors in a specific project, leading to them being overtaken by competitors. They also might be countered by a hard fork.

Trying to regulate bitcoin specifically will just lead to hard forks because the policy on the protocol is not flexible to be tampered with by governments.

Governments will be creating fiat on private permissioned blockchains (main ones not sidechains) and trying to sell them to you as cryptocurrency. They may not be able to fool you and me but they will fool the vast majority of people. Their objective will be to capture as much of the global market share as they can and stop the flight of money into true cryptocurrency.

The best thing we can do is to teach people about the threat of cyber warfare and how diversity of cryptocurrency and decentralization provides far greater safety than any government can.