I heard the news that in China, for example, cryptocurrencies are not outlawed, but exchanges were shut down until regulators could get a handle on how to deal with the potential for excesses such as fraud, misrepresentation, etc.
A Wild West free-for-all is conducive to scammers, and so some thoughtful regulation that protects users is to be welcomed.
Governments tax income and capital gains. This is how they fund their activities. Clearly, gains reaped from cryptocurrencies are no different from gains reaped from other speculations and investments, so they should be recorded and taxed in the same manner.
I am having deja vu....I read this somewhere.