Though its easy to see why governments would want to regulate the movement of digital currencies, the reality of doing so is much harder. A lot of wallets have no identification to them and rest on a server in a third party country. In the case of offline wallets in devices such as the Ledger Nano, theyre not connected to any network.so is it possible to regulate ?
It's hard for them to regulate cash but they do their best and largely rely on information from third parties -- your employer and bank etc -- and hope people are just being honest and then cracking down on those that aren't. They wont actually regulate actual bitcoin directly just like they can't really regulate the cash in your pocket or under your bed, but they will regulate it via exchanges and the services you use. Lets look at exchanges for example. Most if not all -- especially legitimate ones -- already require KYC to open a new account. They might not know about the bitcoin in your wallet or ledger nano, but they'll know about it when you send money to an exchange. You might be able to avoid that by dealing in cash only but then you've got a lot of cash that is unaccounted for and you'll have to explain the origins of if you ever put it in the bank or try buy anything substantial with it -- houses and cars and so on.