Why is there no way to get taxes? Taxes were collected throughout history, beginning with the earliest recorded history, when nothing was electronic. Cash still enables tax collecting.
But now, they can hide enormous wealth in an untraceable way on many wallets. It's not entirely new - tax evasion is as old as taxes - but it's easier and accessible now for large wealth that was more difficult to hide in the past. If crypto stays legal, you can't control this aspect.
> buying things directly with crypto will become more widespread
I'm expecting this to be the case if adoption happens.