I think this dynamic will play out very differently with something the value of which is mostly determined by current and future-expected transaction velocity &

I think this dynamic will play out very differently with something the value of which is mostly determined by current and future-expected transaction velocity & volume (to the extent that it's not sheer speculation). Now, the cost for services involving Bitcoin, like converting it into dollars, would probably shoot way up. Outlawing Bitcoin (or cryptocurrency generally) would cause a huge demand reduction. Some coins might adjust supply to compensate, but total crypto "market cap" would surely plummet.