I think you're assuming that Square is going to do all of bitcoin transactions on chain.
I reckon they will handle most of these in their internal ledger the exact same way they handle USD type transactions. BTC could only move from the core secure wallets when BTC are leaving their systems.
I reckon they will handle most of these in their internal ledger the exact same way they handle USD type transactions. BTC could only move from the core secure wallets when BTC are leaving their systems.