Of course, digital currencies like bitcoin and altcoin require regulations, other than because of anonymous, fluctuations in the price make crypto currency does not work by name. Currency needs a fixed and stable value. So it can be used to assess an object. The current case of crypto currency is a commodity, and not as a currency.
I think when we talk about currencies, we also talk about how the economy flows. The government enforces laws in digital currency because it can be a source of crime. If the government will not regulate cryptocurrency, it can become a tool someday to fight and will produce conflict in our society.
First of all, we are not people who can make regulations for cryptocurrency other than the government.
Digital currencies are like banknotes even though they differ in features and processes in using, both have the same usage. Crypto and fiat have value and they are currencies.