From what I have heard from crypto people in the US, you have to pay for capital tax gains if you purchased crypto and made profits from it then you should really try and get it done as quickly as possible so they don't come to you later on. In other countries filing for capital isn't that necessary or not even required but in US, its mandated. I know there's a way to waiver it or reduce it but I'm not sure how. Maybe someone in crypto based in US can clarify more