All my life, I've been told that rich people don't need to spend any of that wealth. Instead, they just have a bank account where they receive a percentage of the total sum on the account every year or month or whatever time period, simply for allowing the money to be there rather than at home in the mattress or as gold bars in a safe. And then they live off of that amount, meaning they never spend any of their "actual" money.
But if you own 10 BTC, that's 10 BTC... and then it's 9.999998... and then 9.999997, and so on. Its absolute number slowly decreases until 0, unless you keep buying new coins for fiat money (or otherwise obtain them) to add to your wallet.
I frankly don't understand why any bank would give you money (rather than charge money from me, as my bank does) for simply keeping your money there, but since it's apparently a thing, I thought that I should at least ask if this is logically possible with Bitcoin.
And I do not mean sending my BTC away to some website or any kind of third party. I'm talking about retaining control of them in my Bitcoin Core fullnode wallet on my encrypted PC.
Is there some way, or planned future feature of Bitcoin, to get "interest" on your coins simply by holding on to them? So that they always grow a little, not just in terms of their "value" in the real world, but as in increasing ever so slightly?
Maybe they would never do this at this point, now that Bitcoin's rules are somewhat "established", and maybe it's not logically possible without sending your coins somewhere and trusting that party (which I would never do), but I need to at least ask.