By Tom Wilson and Tom Westbrook LONDON/SINGAPORE (Reuters) -Bitcoin climbed to shy of $40,000 on Monday, after yet another weekend of price swings following tweets from Tesla boss Elon Musk, who fended off criticism over his market influence and said Tesla sold bitcoin but may resume transactions using it. Bitcoin has gyrated to Musk’s views for months since Tesla announced a $1.5 billion bitcoin purchase in February and said it would take the cryptocurrency in payment. He later said the electric car maker would not accept bitcoin due to concerns over how mining the currency requires high ener…

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