https://www.investopedia.com/articles/forex/121815/bitcoins-...
"Bitcoin's price rose again on April 13, 2011, from $1 to a peak of $29.60 by June 7, 2011, a gain of 2,960% within three months. A sharp recession in cryptocurrency markets followed, and Bitcoin's price bottomed out at $2.05 by mid-November.4 The following year, its price rose from $4.85 on May 9 to $13.50 by Aug. 15."
So let's use that $2.05 price as "ten years ago," I'm willing to give you 10 and a half years ;). A dollar in bitcoin then would be worth about $20,000 now.
So sure, pretty good. Nowhere near tens of millions, though.
And that $30->$2 change, and a few more up/down cycles between 2012 and 2017, shows that plenty of people thought it had already peaked. See also the various "oh no I lost my hard drive with the bitcoins I'd mined since I didn't think it was that important" stories. So sure, getting in for just a few bucks before 2011 and holding? Yeah, you're looking super great! But most people hadn't heard of it by then, and that's not who the article is talking about... when they did hear of it, you had a huge wave of pump-and-dump shitcoins proving the point of the article: the average person getting in at that point was largely too late for the level of return they were looking for.
https://en.wikipedia.org/wiki/History_of_bitcoin#2010
Of course, you had to be a serious deep-in-the-weeds enthusiast to get in that early. Maybe that's the sort of people who tend to make money on collectibles, too.
And with NFTs, there's just this endless sea of them. Even within one collection, most of the supply stays dormant so there's no telling who might wake up at any moment and completely flood the market.
...typically, anyway.
If you're leveraged, you are borrowing money, which means you can lose more than you put in as you could lose the money you borrowed and thus would owe on the debt. Further, if you are shorting bitcoin for instance, there is no floor.
So while there is downside pressure from liquidation cascades on the levered positions, the main point is that volatility in general will smooth out. The juiced up all time highs we've seen so far have been driven by leverage. Maybe BTC sells off to $12K but if there was no leverage in the system I think it would take a lot longer to bring up to $69K than it did before.