It seems to me it's best to save money directly in a bank account even though rates won't be that high compared to "De-Fi'. Or you could put everything in BTC and wait until it goes all the way to the moon. Who knows what the future of stablecoins will be?

I'd definitely go with the Bitcoin option, though i wouldn't put everything into Bitcoin, i'd definitely have some of my funds in my bank account which is very pertinent, whilst i hodl the rest in Bitcoin. I mean, it is pretty safer and more reliable that trying to stake stablecoins for profit, Bitcoin has a high appreciation rate in the long term, thus if one is patient enough to hodl their Bitcoin for the long term, they are guaranteed to make ROI, and during the period of hodling, one is pretty sure that the Bitcoin is theirs because it is held in their non custodial wallet and they have the control over it, it is not locked up somewhere in another platform, which is pretty risky.
Having said that, i really cannot tell what the future of stablecoins is, but what i know is that many of them cannot be trusted to be stable or safe, they can lose their pegs in the event that whatever they claim to be backed by collapses, and quite a lot of stablecoin hodlers do not know this.