It mostly depends where you live. If you're holding for the long term then in UK or France you could expect to pay capital gains tax, but in Germany or Portugal there should be no tax on gains from long term crypto holding.
If you're actively trading (e.g. more frequent trades, as your business) then UK and I think most EU countries would tax profits as income. I am sure there are expensive tax lawyers who try to figure out the grey area between holding and trading.
Thailand seemed good as a territorial tax country, but they change their minds too often for my liking︀ and I don't like the bureaucracy.
Georgia now has Ministry of Finance Public Decision No.︁ 201, which looks very promising for trading as an individual (I would love to find︂ the original Georgian language text and ask someone to translate it).
I wonder what other︃ countries have no (or low) tax and no (or little bureaucracy) for crypto trading, and︄ are well serviced by crypto exchanges and banks?
Choose a tax friendly country for your residence, and not︆ be a citizen of USA (and maybe Eritrea).