Bitcoin at that price would die due to low security and constant attacks - every script kiddie could target it with a medium-sized botnet.
99.999% of miners would abandon it completely, aside from a few hobbyists, because no one mines without profit.
So why would anyone buy it? I'm sure there would still be people willing to buy, but it would be like purchasing a dead scam coin that pulled a rug pull ten years ago.
...If anything happens to the price of Bitcoin, the price of cryptocurrency will crash especially many of the altcoins we are seeing in the market.
Monero would take over as the only cryptocurrency not used purely for speculation, but for real-world purchases. This event is referred to as "the flippening."
/Over&Out.