I followed this person on Twitter https://x.com/DrProfitCrypto.
Not saying that he has that huge of a following, but he's been saying multiple times that it will still drop to as low as $70,000 before going up again.
Of course, this might be wrong, but the point is that there are still people out there that thinks that Bitcoin will still fall down hence, they're betting on it as well. They might have insider that tells it to them, but that's what rich people are doing. I don't want to tell that they aren't in the right sense just by doing that kind of thing. They're just risking their money and that's what rich people do - risking their money because they can afford it to lose. 
I've done some leveraged trading and even if you know where the market is going, it's still dangerous and very risky
Let's assume that BTC is going to fall to 70k USD and you're sure of it
You can short BTC 10x, 20x or 50x
However, if BTC has a pump day for whatever reason, you could be liquidated in a few seconds and the price could fall later, but it won't do any good, you'll have lost your money.