But....shares are useless until sold. Even if you have 1BN worth of shares it means nothing until you actually sell them/trade them? In fact, they could be worth nothing next week, how can you be taxing someone on a hypothetical sale value?
>>Indeed, that's how my own labour income is already taxed. I first pay income tax for 2021 based on my income in 2020 - whenever it turns out to be too much, I can declare it later and will get a refund. But, I can't pay $0.
That's literally insane. So you're basically giving your government a loan a year in advance? Why? Why not pay your income tax when you know - you get your income, like the rest of Europe does?