The biggest scam, which will cause a shock to crypto markets (for better or worse, capital flight will fly to other stablecoins and or back to Bitcoin) is Tether, USDT.
Yep, USDT will destroy the market if it gets shut down.
Anyway, if you check the market, XRP went up 30%! I don't think it's a dead cat bounce since the crypto market is so irrational. If the US Government is strong, theoretically, they could wipe scammy projects. But, they are in a bad situation right now, so we have to wait for the purge a little longer.