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 Bitcoin has low fees 
 Because most people hold their coins on Coinbase, etc. But if they actually owned their own coins, fees on the main chain would be stupid high. 
 They would still be significantly lower than fiat. Why would self custody make fees higher? 
 Not enough block space for everybody to transact on the main chain. And so fees would go through the stratosphere. And no, lightning is not a solution to this, as most people would just be using custodial lightning. And that's bullshit. 
 Lightning literally is the solution. Most Coinbase txs happen on chain anyway. 
 Lightning is a *workaround*, not a solution. 
 when blocks remain small, lightning can't scale without custodians. even if every single transaction on L1 was dedicated to maintaining lightning channels, it would still top out at a certain number of sovereign users, and to get more converts to the bitcoin religion you would need them to use custodians. why are you okay with that? do you really think it's cool that someone else can just steal your money or rug you? are you really cool with only a small percentage of the wealthiest bitcoiners being able to own their own money, while everyone else has no protection from getting robbed? 
 Nobody is going to spend from a cold storage wallet in regular transactions. It is reasonable to expect people to transfer from cold storage to a more capable hot wallet. 

Block size does not matter. LN can support millions of transactions a second.