Digital currency is to change the world, many of which were positive, to a certain extent, they pose a containment of the government, gave the people an alternative, but that doesn't mean they don't need to be regulated.
One of the core reason is: anonymous, do not track, not regulated digital currency will make form a closed loop technology crime, money laundering and terrorist, and disappear from unsolved bits, bytes, while the impact damage with each person in this world.
If every penny of extortion is tracked, is there enough motivation and courage to launch a WannaCry to attack the world?
no because people must stay enslaved, at the mercy of the powerful, unable to defend their loved ones from their sexual appetites...
your reasoning is flawed, computers are used by criminals so regulate computers? pens are used by criminals so regulate pens?
the system of exchange and accounting isn't per se criminal.
cars too are used by criminals...
kill the terrorists (like bill clinton and hillary) but not the means of payments.
bank notes are used by criminals...
etc
etc.
they can always get paid in underage sex slaves...
frankly you are so naive.