Sell and re-buy? When we talk about passive income with bitcoin, it's because you've reached a level where you don't have to repurchase. Since you gave that example, I'll give you another: you bought 1,000 bitcoins more than a decade ago, and with your lifestyle, you only need 1 bitcoin a year to live (at current prices). All you have to do is click twice when you need to sell.
The amount of your illustration is too huge, it's not able to be achieved by Average Joe. I think someone in this forum might have 1K Bitcoins, but what's the point to discuss a high privilege person to low privilege people? the high privilege person trying to show if it's possible to be achieved by low privilege people, when the reality it's not.
In your illustration, you have 1K and you only use 1 per year, which mean 0.1%
While in @OP illustration, he have 1 and sold 0.1 at the first year, which mean 10%.
If someone can live comfortable in a year by selling 0.1% from 1 BTC (0.001 BTC), then yeah they can treat Bitcoin as a passive income because they don't need to do anything to live comfortable.