Ethereum was introduced in 2014, so I'd say blockchain based smart contracts are only 6 years old max. Try looking past bitcoin and see what's happening in DeFi. https://defipulse.com - any of the top projects are worth looking into. Don't be so quick to judge. A lot of progress has been made the past year and DeFi is much more sustainable.
Imagine if Facebook did something like this with $FB stock to reward it's early users: https://www.theblockcrypto.com/linked/78255/140k-addresses-u...