I have another theory, when btc finishes mining, everyone will sell their btc, because they wanted cash and the price of btc will plummet, they won't want it for free.

I have come to the conclusion that BTC was born to be sacrificed, to introduce the new financial system.
Let me explain: remembering BTC was born challenging the system, no one wanted it, not even the banks... now it turns out that it is part of the Cryptocurrency reserve of the US and El Salvador...
what better way to destroy the financial system than by entering its coffers, and it turns out that one day Satoshi, or whoever the founder is, decides to liquidate his BTC to bring down the system, and who do we blame? who will be responsible?... there is no other option but to create a retail CBDC, where the Fiat money we know stops circulating, backing it with assets over which there is control XRP, ADA, SOLANA, Ethereum.
I get the impression that all this is a show, to introduce a new digital financial system... and Bitcoin is that lamb that was born to be sacrificed.