Possibly people are still looking for some ground for security, since scam is rampant in a decentralized environment, they are into seeking a more secure environment to invest their money. It looks like only a few are ISO20022 compliant.
Unfortunately for them, some so-called compliant projects that they think are secure are actually not, and some have show fraudulent tendencies. Ripple is one of them. The other is IOTA. There's a thread about IOTA's fraud in one of the boards in this forum. I just can't seem to locate it right now.
To invest in one of the coins above, I would rather invest in Doge or even a joke token like SHIB