There is always a possibility...look at all of the fraudulent DotCom companies, look at all of the fraud that goes on in traditional finance, or other investing. I believe that there is a lot of fraud in government activity and taxation. There are bad players and the regulation which will hopefully come out of this will help a lot.
That said, companies are still moving to blockchain. That many DotCom companies were a joke and very poor investments, didn't make Apple and Microsoft junk...they still went on to be dominant in life in the developed world.
Look at what the fully regulated traditional finance banks did in 2008.
As for FTX... Sam owned 90% of Alameda and Wang owned 10%. There are about 10 people in this operation who are bad, bad people.