What I know is that countries are planning to impose regulation on cryptocurrency exchanges but not on cryptocurrencies like bitcoin and ethereum because they already decentralized meaning no one can control it or make some changes in the coins itself. Regulations are good if they are not restrictive or there are too much rules on using any cryptocurrencies. If the aim of the regulation is protect the users and curb the use of cryptocurrencies in illegal means like money laundering and trafficking, it will be good.