[gnaritas]

Where does this idea come from that Bitcoin is somehow special from every other taxable commodity and is somehow harder to tax?

They don't tax Bitcoin, they tax you, and you can evade taxes in any currency or commodity if you're extremely careful and not very risk averse.

Barter is taxable, yard sales are taxable; people don't report them because it's too small to get noticed but if you're making a killing doing it, you're going to get caught.