1. Proof-of-work is a feature.

2. Just do the conversion at the time of sale.

3. Government prohibition and restriction of our rights is a terrible problem and it's why Bitcoin was invented in the first place. It's a necessary fight if only to keep government power in check, unless one really believes the State is always right and always has our best interest in mind. I don't.

The colossal amount of energy burnt by proof-of-work is one of the reasons people who are not cryptobros loathe crypto.