Coinbase CEO Brian Armstrong has denied allegations that BlackRock bought a Bitcoin IOU. Analyst Tyler Durden has alleged that Coinbase engaged in market manipulation by giving BlackRock uncollateralized Bitcoin. Armstrong noted that the ETFs are settled on-chain daily and institutional clients can use trade finance and OTC tools. Durden has deleted his tweets. Experts emphasize that transparency of Bitcoin ETFs needs to be increased. 🚀📉