The US government doesn't care if the nation is getting richer as a whole. What they care is to keep their tax salves as indebted, subjugated, ignorant, overworked and obedient as possible, so that they can retain absolute control and maintain themselves at the top of the pyramid. Now if freedom minded folks are allowed to make serious money in crypto, they are going to get more and more interested in that technology, quit their jobs, and have plenty of time to develop, fund or support even more disruptive shit that's going to make it even more difficult for them to keep the lid on the people. No way they can let that happen.