we don't need to regulate cryptocurrencies but regulations can be also helpful with the adoption and growth of them or they can be restrictive and even prevent the adoption altogether. in the end it will come down to what they are regulating and how. for example if it is regulation of exchanges and if it leads to a more secure place where people can trade with less risk that would be a very good thing.
That's right! Regulation can lead to a global consensus of cryptocurrency as well as the people that want to use it. It can be also a proof that crypto is not illegal and many people will attract by using of it. Because cryptocurrency becomes popular nowadays, we can never prevent of using it in criminalities. However, if there is a law imposed by the government, crypto activities can be tracked and illegal activities can intercept.