Of course they want, but only how they will do it. States want to tax everyone who makes money on the Internet but just dont know how to do it.
There is a version that the creation of bitcoin and subsequent altcoins was under the control of certain services of certain states. This is a bit of a test. Thus, they are well aware of how to receive taxes from those who make money online.
There are many conspiracy theories about the origin of Bitcoin and the anonymity associated with It. It's hard to say whose experiment it was.