With respect to fraud there are two aspects to this, first the platform and the lack of regulation, there is some and its getting better but its not enough. And then of course the underlying 'asset' which has no intrinsic value, no cash flows etc....
FTX operated largely outside any form of regulation so we should not be surprised this happened, Bernie Madoff ran a ponzi within a regulated market (probably the most regulated in the world) and it still happened.
I have held crypto (bitcoin and ether) via ETNs from Van Eck. I made some money but I was never in for more than 2 to 5% of my portfolio at any one time, I treated it as a speculation and always creamed off any profit. I have never traded crypto or held coins on platforms because I simply do not trust them, its largely unregulated and I dont want to faff about with hardware wallets.
The violent market moves in the corona period made it hard to hold (stomach), it has died down since then though.
It looks like regulated ETFs are going to be allowed to trade, at least for Bitcoin, which is an indication its here to stay, once institutions start getting onboard you can expect it to get a little more traction which might fuel the narrative that its good diversification for dollar assets or gold (which until now it has not been)
Edit : above opinion is based upon the speculator in me, not on the value of crypto
