What do you think of defi projects, most of them are only good for the short term.To make a big profit, we must enter at the right moment, if we are wrong we will lose very deeply.
This current DeFi hype is just like the ICO hype back then in 2017-2018,its a bubble so it won't last for long, and majority of the DeFi projects are scam, for the past 2months they have been alot of scam, even if some are real projects, they are just pump and dump nothing else, example of a pump and dump is Hot dog 
, and like you said it's only good for a short term investment, immediately it pumps you sell and walk away, and don't look back