- Earn yield on stablecoins or cryptoassets by providing liquidity on an automated market maker. The yield comes from trading fees that are redistributed to liquidity providers (i.e. no one is getting defrauded).
- Earn more yield using a yield optimization service such as yEarn
- Use your cryptocurrency as a collateral to take out a loan for half its value with Alchemix. The collateral is invested in yEarn and the yield received slowly pays back the loan.
- Use an insurance protocol to take out a cover on the money you have put in either of the above mentioned protocol to protect them in case of a hack
- Manage an entire organization (DAO) and its payroll, where you currency serves as both voting rights for the strategic decision of the organization and as a way to reward contributors without having to deal with the headache of local currencies.
- Mobilize thousands people around the world to act as arbitrators to resolve an ongoing dispute (Kleros)
- Store files in cloud service built on top of a decentralized and censorship resistant way (Filecoin)
- Sell unused or underutilised cloud resources (iExec)
I know people here are skeptical of crypto, and it's fine. Maybe it won't change the world. Maybe the bubble will pop. But even then, I find it hard to not be at least a little bit intellectually excited by the new forms of organizations and new financial models that are emerging out of the space.
Also, as by disaster I assume you are referencing the ecological costs of Bitcoin, most of current blockchains have moved or are moving towards a proof of stake model that is much more environmentally friendly. With Avalanche, for instance, developed by Emin Gun Sirer at Cornell you can still run a node on a Raspberry Pi.