Yeah but that's not the situation. If you have a bitcoin you can sell it to another person for several thousand real US dollars. Even if you hate crypto it has that value to it. I mean re "about 0.00001%" I've bought and sold bitcoin myself and usually for actual money.
True there isn't much intrinsic value to the 0s and 1s making up a bitcoin but there aren't much to the the 0s and 1s making up the US$ or similar in your bank account.
They’re worth something today because people want them today. If they don’t have any real-world yield, that doesn’t make them worth anything tomorrow. As FTT just demonstrated, like so many have before.
Crypto is worth something in that it can be sold at a higher price. USD is worth something in that at the point where it isn't you already have much bigger problems