My best guess is that custodial wallet (eg. "we'll handle your finances, trust us...") services will be regulated into submission a-la banks, and P2P transfers will be an ongoing issue a-la cash. If war is declared on cryptocurrency, it will probably be for national security or economic superiority reasons. My $0.02, I haven't held crypto in years.
In contrast, the stock market is a total mystery box as to even how many shares are even being traded with all of the tomfoolery with shares being borrowed and sold short, dark pools, and lots of crazy things that you'd need a decade in finance to even begin to understand.
The stock market is comparatively stable because the dialectics of "scammer" and "businessperson" are more clearly defined. By filing with the SEC you are using your credibility as collateral with a central authority; even if we both agree that government mediation is a bad idea, it's been the standard since the ancient times and will probably continue to be valuable for as long as we have sovereign states and people that live in them.