Peter Schiff is somewhat of a hack. His schtick is the "imminent collapse" of the dollar, which he's been on about for decades now. It's how he makes his own money, selling investment advice to investors who buy into that sort of thing. The reason he's anti-bitcoin is because if people believe bitcoin is a legitimate store of value against this risk he's been hyping for years, then they don't need his investment advice and his assets under management goes down. I used to be a fan of Schiff, but he constantly wrong he was has turned be against him and I don't take him seriously anymore.