I cant imagine living in the US and dealing with tax, everyone I hear talk about it seems to dread it, I see people on the TV with stacks of receipts, whats that all about!
Im not saying the UK government is good at tax, but for most people its just taken directly from their pay packet or as they spend money, or as you earn interest. No forms to complete, nothing to evidence, simple.

Its only if you start to do unusual stuff like foreign currency/shares that it gets more complex. Even with crypto, unless you are a day trader, its only when you sell back to pounds that you need to consider if you exceeded an annual capital gains threshold. Convert less to £ than the threshold, no worries. And lets be honest, who wants fiat anyway :)