Bitcoin is decentralized. Anytime it can vanish since they do not care about the rules and regulation since no one controls it. So they can vanish whenever they want.
How would bitcoin care for the regulation, you don't address bitcoin like it's a system because it would be useless without people using it.
Do you think people would not abide the law when there is a regulation? of course, as people who are investing on bitcoin, they will also make sure that bitcoin will continue to exist and to grow, so their investment will also grow.
it's decentralized, we all know that, but we have a centralized government where bitcoin users should adopt.
it will not be stop due to its decentralized nature, and we don't need government permission to use it, but once it will be declared illegal, it will create big problem for people who insist to use it.