The ability to buy and sell the cryptocurrency and cash out money for people should not be limited, but it is beneficial to the country. But the industry of ICO is worth adjusting, a lot of scams and scammers, that need to regulate.
We cannot even expect each country to stay quiet on regulation as long as fiat is still involved and as long as we cannot discard the availability of fiat in the system. The governments have a lot to gain, so at the end, it is a win win. We get the freedom of keeping our funds without having to put it in the bank, we can transfer between peers and still have nothing to do with the government and if need be to change to fiat, we should really have no problem with regulation.