DeFi seems to be the next thing indeed, but we should tread carefully and do serious research on new projects, because the smart contracts need to have zero vulnerabilities to prevent hacks and the teams need to be reliable.
Imo, in the incoming DeFi bubble most money will be made with small projects that nobody knows about until they reach a mainstream status. Things like XIO, JRT, RAISE and a bunch of other lowcap DeFi projects I guess, but you have to DYOR very well to avoid the obvious scams and the not so obvious ones, cuz right now I bet theres a new DeFi token launched almost everyday, and many of them will fail

I did not learn about Defi, but I am sure many investors have mentioned this investment trend over the past few months. I don't feel interested in Defi because such projects will soon be forgotten, so in general don't rush to invest if you don't already understand. In addition, many MLM projects use Defi, so before you do anything, you need to consider carefully.
Not really. There are still Defi projects that are promising and successful like Algorand. I don't know if you heard of it because it keeps the Blockchain Trilemma such as security, scalability, and decentralization for a lifetime, and can be safer than traditional financial systems and give the best solution for Defi.