Cryptocurrency and blockchain-related stock sellers have suffered significant losses since bitcoin surged to all-time highs on Nov. 6, according to Reuters, with data analytics firm Ortex disclosing that traders shorting MicroStrategy (MSTR. O) lost more than $1.20 billion between Nov. 6 and Nov. 8, and have lost more than $6 billion so far this year. As of the close on November 8, short sellers of cryptocurrency exchange operator Coinbase Global, crypto miner Riot Platform, MARA Holdings, and Bitfarms had accumulated losses of about $1.20 billion. Additionally, investors shorting BlackRock's bitcoin exchange-traded fund iShares Bitcoin Trust have lost nearly $37 million since November 6.