For me at least it would be something I would vastly prefer when it came to tax paying time.

As it stands I would have to go to an exchange and sell, worry about getting frozen there, worry about withdrawing successfully, worry about the bank having a shit.

The alternative of one QR code on the tax page is way more appealing.

I presume these are property and state taxes rather than capital gains which is a rather different matter. But for the big stuff it would remove a whole lot of hassle.