How is the capital gain are calculated in this case?
Usdt, pax, etc, are not strictly cost 1usd. Their price volatile to the usd.
So, exchange one crypto to another, as well as exchange︀ crypto to stablecoins are not same as exchange to fiat.
Calculation capital gain is not︁ so trivial, and probably doable process(until the tax authority in specific country provide exact rules︂ for such events)