There is always something to lose when investing, lending your coins for interest will always be risky and the ones who put their feet to risk are always the ones going to take profit when things are going good but they are also the ones losing more when things got ugly. The only safer option if you want to make money without taking a high risk is POS.
I don't think POS is possible with Bitcoin Ethereum and some top currencies rest all are pretty volatile so even if you are gaining coins you might not end up gaining anything in dollars.
Yeah its always been the dollar that matters when it comes to profit. That when BTC hit ATH and will try to dump all they have because they think bull market is about to end. If you have 1BTC before this bull run and then end up having 1BTC still after the dumps, there is no difference as you didn't get richer.
OP didn't say its just BTC, he meant crypto, which means it could be ETH or just about any token that's POS. Having 50K of ADA and then stake it in a wallet and after a week of epoch he gets about 51K of ADA then he is 1000 ADA more richer than before.
Very good point I must say. I have seen a lot of HODLers thinking they will never sell. I am myself more interested in selling somewhere around the highs so that I can buy back later you can obviously expect a correction really soon in this market. So dollar does matter. What good is a btc that gives you 20% interest in a year but after the year the value has already depreciated by 30% ideally you lost your money instead of gaining anything. I am surprised why most people don't think this way.