You will never find a good passive income with bitcoins that you can't find in fiat already, sorry, at least not now. There is no point in trying to make bitcoins from nothing, it's better to get a job and work for a few months then buy bitcoins.
Bitcoins is mainly used for the volatality and hence even if we can't find a passive income opportunity, holding the coins would be more than enough. The people who bought BTC when the price was $1 for a bitcoin must have now accumulated a lot to buy a house but selling those bitcoins is the only thing that's questionable.
Who the fuck uses bitcoins for it's volatility besides traders. If bitcoins are volatile holding them is not a good idea, do you even use logic? Yeah people who bought bitcoins at 1 dollar made profit and people who bought at 1000$ are now crying, what's your point?