Right now regular people only have a few different options to invest in:
1. Stocks
2. Bonds
3. Cash
4. Your own bootstrapped business
5. Cryptocurrencies
6. Lottery
The first 2 are obviously limited growth opportunities... Corporations are already massive, people will never get the 100x or 1000x returns that they need to actually notice any lifestyle difference... And even if they did, by that point the world would be a horrible place not worth living in and you'd be near the bottom of the pile because you got in too late.
Interest rates are too low so holding cash is pointless.
In this VC-dominated and corporation-dominated landscape, the odds of successfully bootstrapping your own business are near zero and everyone knows it.
Lottery usually appeals to the working class due to the large potential payoffs. But everyone knows that the odds are terrible and that there are middlemen taking a cut.
Cryptocurrencies on the other hand are like a giant international startup which aims to disrupt the entire financial system and which is in a very good position to do so because everyone is in on it. The returns are great and the odds are much better than lottery.