Even then, what about the dozens if not hundreds of other places to trade for BTC...?
And, to save you and others telling you, some time: exchanges are not the only markets. DEX is a huge factor.
It's reasonable to believe the market price is crazy. But it's crazy to believe the market's mere existence is a huge conspiracy theory 15 years in the making. Just call the buyers irrational if you must.
And don't forget FTX was an offshore shitcoin casino that held exactly 0 bitcoin when it collapsed. It's a stretch comparing that to regulated US exchanges.
citation needed
So you believe Fidelity and Coinbase have been lying in their corporate disclosures for the past 10 years, along with thousands of other companies all over the world, just so they could throw hundreds of billions of dollars of their own money into a black hole, to prop up a trillion-dollar asset class for 10 years running... why? Just for fun?
Do you also believe the Nasdaq doesn't actually exist?
This is also a clear example of how difficult it is to prop up a coin, even relatively illiquid ones like the FTX coins. FTX could sort of prop up their own coins, but not really. They couldn't move prices high enough to keep lenders from recalling capital, and they couldn't support prices at all when there was a confidence crisis before the collapse.