>You buy 1 BTC at $60k in 2024. In 2025 it’s valued at $100k, so you pay taxes on $40k gain.

Right, and at this point in the argument it’s also worth asking ”pay taxes with what?” which also quickly makes the idea of taxing valuations obviously absurd.

It would force any value creator to sell his creation, which basically destroys the mechanism from which all welfare for anyone in our societies currently originates.