Companies that issue stocks have the capability to create value through the people that they employ, the products and intellectual property that they have built, and the reputation that their brand carries in the marketplace. You are basically buying a part of a value creating ecosystem. That’s why stock survives.
Some of the cryptocurrencies have an asset or service backing which means that they have some value, but the majority of them are collectibles - scarce, irreplicable tokens. When people stop wanting to collect them, the value drops to zero.
The thing that will keep these collectibles changing hands is that they have utility - people who are wanting to get around the regulated markets for shifting valuable assets due to transaction costs or the need for privacy. Unregulated they will continue to be used for money laundering, nefarious transactions and for transacting at a lower cost than is available via traditional networks.
This is useful, but doesn’t give them intrinsic value as, say, an economy gives a currency value or a company gives a share certificate value.
Speculate by all means but don’t pretend you’re investing