Many crypto leaders criticised Michael Saylor for advocating banks over self-custody in the Bitcoin storage debate.Saylor, former CEO of MicroStrategy, now believes that banks should be relied upon for Bitcoin storage.Crypto advocates strongly opposed Saylor's view, citing risks of centralization and hindrance to technological innovation.Ethereum co-founder Vitalik Buterin called Saylor's comment 'batshit insane' and argued for decentralization and self-custody.