Good idea, and I am a supporter of it, but it is not what is normally understood by passive income, although it is. Normally it is something that gives you extra units from what you already have, like if you have 1 Bitcoin and you deposit it in a place and it gives you 4% APR, so at the end of the year you will have 1.04 Bitcoins.
But if you buy a bitcoin today at $66K and sell half of it when the price reaches $132K, you will have obtained $66K of passive income and you will still have the initial $66K of Bitcoin purchasing power left. And all in all you will have only made a few clicks to get it.
The latter is better.
It's hard to find platforms that will give you that 4% APR for BTC, I mean you can find one platform but entrusting them your BTC is the harder part.
If thinking of a passive income schemes to invest it should be one that you have control over your money, this is one of the criteria of involving yourself in a good passive income scheme. If it is a scheme that people manage your investment for you, then I will say it is not something that you can truly trust because anything can happen.
I agree.
I'll choose the slower part but I have control over my money, my BTC.