I also do not entirely trust 3rd companies or parties, and also they could be forced to follow governments regulations, so they are a risk.
From my understanding, the world will expecience for the first time 2 different types of markets or economies, centralized and decentralized economies, so you could choose protocols like BlockFi (Centralized) to invest your money, but also you have Compound, AAVE, YFI and others (decentralized), both will have risk, so basically is up to us (each person) to analyze properly a protocol and decide if the risk reward is worth or not.
But the cool part is, fort the first time, you will have the ability to choose how or where you use your money, before that what do we had? Bonds? 
PD: I do have funds in blockfi, a portion of my portfolio, just because the APY % is good enough, so for me, the risk reward is worth it to give it a chance (still i’m completely aware that they could goes with a very stupid excuse and get all my money, hopefully my analysis give me confident enough to trust part of my funds on them)
Carlos Z.