But they massively failed their core challenge, which would have made them great successes — they never solved the problems of security and usability. (and no, wallets, cold-wallets, hardware keys are all still vulnerable and clumsy to use, and confirmation times randomly jumping between 50-2500 minutes in the last month [0], not usable). The result was clear years ago when many vendors who had started taking BTC and ETH payments started quietly dropping the option.
And the people thinking BTC is a Store Of Value for prepper-survivor-type collapses are hilarious; you can dig up your hoard of gold, but when the electrical grid and the internet dies, good luck transacting in any cryptocurrency.
So, the only thing setting it's value now is the Greater Fool Theory — the expectation that a greater fool will come along to buy at a higher price. The BTC whales cannot cash out at the paper "value" they see today. Which is exactly the scam Musk is trying to run on the US Govt. The "Strategic Bitcoin Reserve" will fleece the US citizens and taxpayers into being the buyer of last resort, allowing the whales to cash out.
Sad ending to a technology that started with so much promise. All because those in the field never really did the hard work of ensuring it was broadly usable, instead just focused on promoting it.
[0] https://ycharts.com/indicators/bitcoin_average_confirmation_...