I'm curious how you would scale bitcoin to 8 billion people, each making multiple payments per day Channel factories (e.g. Ark) could be used to build "Lightning channel factories", allowing multiple users to share one UTXO in a fully trustless way. This is the only serious idea I'm aware of to scale non-custodial bitcoin to the entire planet If you're working on some tech like that, I'd love to learn more In the meantime, until we see if we can find and implement such a solution, the world is going to need custodial solutions. And therefore, development will continue of the best form of custodial payments to enable billions of people to make their small daily purchases in the most private way