Citigroup Downgrades Microstrategy to 'Sell' Rating Over 'Aggressive' Bitcoin Purchases Citigroup has downgraded the Nasdaq-listed, pro-bitcoin Microstrategy to a “sell” rating a… Previous: Wells Fargo Investment Institute Report Compares Bitcoin to the 1850’s Gold Rush Next: Fuhro.dex was launched in early February, the world's first turbo dual power cycle system