This happens after events like this - people show up after the fact saying they told you so. There's usually news clips, articles or even tweets where they loud

This happens after events like this - people show up after the fact saying they told you so. There's usually news clips, articles or even tweets where they loudly and clearly claim "I am saying that X is going to happen". And they're often getting laughed at or being described as hysterical, so I don't begrudge people if they want to get a bit of revenge and indulge in a bit of schadenfreude at their erstwhile tormentors' expense. But to try to claim credit with "my friend privately said X would happen" is a fairly bizarre brag, I don't think second-hand dubious clout is worth much. In any case, a good number of people have been loudly pleading with the world to be not just skeptical of FTX, but of all of these insanely valued crypto companies - they're often dismissed as haters.