Passive income with bitcoin is tough, there are few places like binance and freebitco.in that end up doing something like that, but its usually not that big of a deal, and not a big return. I would say just DCA and accumulating is the only way to move forward right now. You shouldn't try to make profit during the bear market, you should minimize the loss during the bear market and if it works then it works, if it doesn't work then it doesn't work. But trying to make a profit during the bear run will lead you to riskier and riskier stuff that would not be smart, just staking for %1-2 return could be the only thing you could do at this moment, nothing else for passive income.
I hope the OP is thinking thru about this as some suggestions are quite risky.
Passive income is indeed hard to accomplish in this market, you will be more on the side of losing.
Staking is good if you found a progressive alt, but if its value is going down, you won't get profit from it.
I will prefer more on holding btc if you are financially capable. And just wait for the time when bullish season comes again.
Investing in lending platforms for me is quite risky also. As you won't know their lifespan, they can even abandon their site without a warning.