until now government won't to penetrate the system o crypto if they going to legalize the btc they do it to gain something
but its better to collect tax in a bitcoi earner than to provoke the government and make them realized that btc is no benefits in the economic if they do they just banned it in a whole country making the btc price fall
yes they can't take something from this crypto transaction, they can't even have any tax regulation about bitcoin or other decentralized cryptocurrency