I agree. At this point in time, I don't think Bitcoin or other cryptos represent a significant threat to the dollar or other fiats, simply because they have such a small market share. They just aren't used much as a currency, and are primarily a speculative investment right now. But as they integrate into the economy, this regulation or prohibition is a real threat many individuals refuse to acknowledge. With that being said, I do think that there are advancements in technology on the decentralized side of things that have and will be created in the future that will allow those that choose, to still use cryptos. But most of the speculative money will have left, unfortunately, and they will go back to what Bitcoin was a few years ago. Something techie libertarians bought, and something the dark web used.
Worst case scenario, of course.