Regulate cryptocurrency? I think that is possible to happen that cryptocurrency will be having a global regulation.
What is decentralized? these cryptocurrencies will have on that so they did not take regulation to this digital currency.
How do you think, how can you create a central office system that regulates the cryptocurrency market? Without it, it will not be a legal payment system ...
This problem will depend on which country you are, each country were having a different perception of cryptocurrency.
There some countries that they accept the technology behind these cryptos, so not legal or illegal but still, they can used cryptocurrencies to their place.
What IF the regulation will truly come what will happen of being anonymous to the crypto?