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** Shares of cryptocurrency and blockchain-related firms fall after bitcoin briefly slides below $40,000 to a 5-month low** The world's largest digital asset was last down 2.6% at $40,800 after falling to as low as $39,558.70 on…

Representation of cryptocurrency Dogecoin is seen in this illustration taken November 29, 2021. REUTERS/Dado Ruvic/Illustration/File PhotoRegister now for FREE unlimited access to Reuters.comRegisterJan 14 (Reuters) - Tesla Inc (TSLA.O)…