Definitely yes, I believe it is a neccessry step! However, Once economies began receiving crypto currencies, just like the existing ones ,the lot of nations that have publicly engaged in crypto have already adopted legislation and restrictions sometimes. But believe that the majority of countries with an interest in crypto will undoubtedly comply, as they will forfeit a significant amount of money if she permit crypto to continue trading under supervision.  Restrictions, just like any other business where there is no law, there would be no sin.
Yes, restrictions would definitely keep cryptocurrencies safer and secure since users would be protected from potential fraudsters.