Ethereum co-founder Vitalik Buterin has strongly criticized MicroStrategy founder Michael Saylor’s recent suggestion that crypto users should rely on big banks to custody Bitcoin. In response to an Oct. 22 post by Casa’s chief security officer Jameson Lopp, who was advocating for self-custody, Buterin said, “I’ll happily say that I think Saylor’s comments are batshit insane.” This criticism adds to the growing backlash against Saylor, who on Oct. 21 recommended that Bitcoin holders should trust “too big to fail” banks engineered to handle financial assets, a stance that seems to contradict his previous support for self-custody. Buterin argued that Saylor