Hi Jim,
you are supposed to declare whatever earnings in euros you got from crypto trades in annex g section 13001, or as "rendimentos obtidos no estrangeiro" if all the trades were done abroad. Either way the tax is the same.
I strongly disagree with this statement. Portuguese law doesn't have a single word about crypto currencies, exchanges, mining, trading, nothing!
Section G, Rendimentos obtidos no estrangeiro, refers to work done abroad, not to crypto trading!
The law is completely absent when it comes to anything crypto related.
Buying and selling BTC is not regulated in Portuguese law, therefore we don't have to pay anything.
If this is a crime, show me the law I'm breaking will you? Please?