As for your last statement, I don't disagree.

As for your first two, none of that matters, because all you asked for was a publicly-accessible way to turn $100k in 2017 into $2.5m today, in response to the claim that GP could have done it. A crypto or a stock YOLO is how. From what he said, he probably did purchase Bitcoin or something else that went up massively in value, but not enough of it to see a large absolute return. I myself was aware of Bitcoin just after its creation, and had a small amount to invest, but instead put most into a blue chip stock on advice from family. Forget $100k, I could have been a millionaire off of $1k. And I can tell you that I probably would have made that wager if I'd had $10k to invest at the time, let alone $100k. I wouldn't have been expecting such ridiculous returns, very few were. However, the common investment wisdom of relying on "time in the market" would have seen at least a portion of the initial investment through to today.

But that's a little beside the GP's original point, which was that generational wealth made those kinds of (highly speculative) investments tenable. I don't see the point in arguing that they don't when they clearly do. You're on a website founded by a company that exists specifically to invest in such a manner. The entire point is to find the "unicorn".