One good example also are local crypto-exchanges. Because they are under the jurisdiction of their Central Bank. So in a way, they are abiding the laws and regulations of their Central Bank when it comes to crypto business. But bitcoin itself, won't be regulated because of its decentralized nature. Only the businesses employing bitcoin or other crypto services. If the government can get taxes out of these businesses, why not? Rather than treating them as illegal market because they won't get anything, only their underground market will benefit from it.