Industry insiders and Coinbase CEO Brian Armstrong swiftly refuted rumors that Coinbase had issued Bitcoin IOUs. Crypto analyst Tyler Durden, a well-known critic over the weekend accused Coinbase of allowing the company managing the largest spot bitcoin ETF, BlackRock, to borrow the cryptocurrency without posting any collateral. Coinbase Armstrong Rejects “BlackRock IOU” Conspiracy Theory Durden The post Coinbase Refutes BlackRock IOU Rumors, Experts & CEO Armstrong Weigh In appeared first on CoinGape .