We don't need such regulation to control the entire market because it may affect the growth of the entire cryptocurrency market. And more over Bitcoin does not need any regulation but I think altcoins need proper regulation to reduce the rate of rug pulls that had been happening in the market. There are different scammers in the crypto market that are creating new projects and scamming investors running away with the funds.
its not about regulating bitcoin on the network or node level..(EG demand devs make back doors or give government analysts github pull/commit privileges)
its about the business gateways back and forth to and from fiat. and real world stuff like mining farm electricity quotas
matt hancock thinks there needs to be some control of the entry and exits of fiat because fiat is the jurisdiction of government. as is electric
however unlike some nations that want institutional sized businesses to pay institutional sized amounts for licences, fines, compliance and auditing. he wants a simmered down version that even small businesses can handle
im sure this will stretch to centralised projects offering ICO of stable coins where they would need to be highly regulated to ensure auditing of their pegged reserves.
im sure this will stretch to mining operations not stealing more then a fair share of excess power from power companies. but instead of over stretching to just ban mining i see him just telling power companies not to give away too much to any single business operating a farm.. which can actually help decentralise mining by having lots of mini farms instead of single massive farms