Developed countries are progressing because they want people to progress and people pay taxes and help the country to progress...
And both help each other in uplift and progress.
My country in not a crypto friendly - and they there is only 3% of total population who is aware of crypto.
They are also the first ones to realize that there are a lot of money going inside crypto world since they are big nations.
I mean USA can't just say "we ignore all people who go into crypto", that would be tens of billions of dollars going out of circulation and going into crypto and if they do not make any money from it, then it will create a lot of trouble for them as well.
Best thing to do would be making sure that they tax it and follow it carefully, and IRS getting their money. If they do that (which they are doing now) that would allow the nation to not have any loss in tax income, and since they are filled with people who are super rich, it makes sense to tax them for another thing.