I want to trade bitcoin anonymously over tor to avoid paying taxes so i want to make all of my trading using whonix. This is my plan: when bitcoin price go high i want to sell it for stable coin instead of fiat currency, and when bitcoin price go down i want to buy bitcoin with stable coin. I already have Electrum wallet on whonix but which wallet i can use to store stable coin like tether and which service i can use to buy/sell bitcoin for stable coin?