At 7 transactions per second every one of 8 billion people could have an on-chain transaction every 36 years. What are some bitcoin lightning scaling scenarios you see as likely? E.g. increase the blocksize 10-fold and have every person move funds between checking account and saving account on average every 4 years. Or an uncle Jim model where most people never touch on-chain. Or a model where large trusted stores offer lightning banking functionality and most people never touch on-chain. Or ...