Sure you can get crazy amounts of interest in some of the decentralized systems but most of them are traps. You better win a few to lose all.
Dont think that is a good option for anybody and the term "passive income" has been hyped a lot along with people who accept it as a good method to make money because of the term being an oxymoron - you cannot earn if you are passive. Consider the fixed deposit schemes of banks, yes that is a safer method than crypto based investments.
Crazy high amounts of income indicate that something fishy is going on, not that the project is super profitable or doing something revolutionary, that is what bitcoin has done.
What I observed from yield farming is that the long term proposition is not good, you carry a large risk than reward and hence I dont recommend it.