I guess the answer to your question then, would be that there is currently no on-chain scaling solution that allows +1bn users to use Bitcoin regularly.
Yep, that's what I thought, but I was hoping to find out if there was any theoretical way of achieving such scaling, or any such development in that area.
As far as I'm aware, there is also no trustless off-chain scaling solution that exists yet.
The closest you might come to this would be FediMint, which requires you to trust your guardians. Lightning addresses payment scaling, but not user scaling.
Please make yourself familiar with:
Noted. Thank you.
It's non-custodial because funds are stored in 1-of-N multisignatures and the protocol allows for you to get out any time you wish
Again, this 1-of-N fallback option is irrelevant when it's cost-prohibitive for individuals to transact on chain.
For the purposes of this thought experiment, assume a single transaction on chain is more than the net worth of most individuals.
The 1-of-N may as well not exist.