Bitcoin miners have been forced to tap into their cryptocurrency stashes as a plunge in prices, rising energy costs and increased competition bite into profitability. The number of coins miners are sending to crypto exchanges has been steadily climbing since June 7, researchers at MacroHive noted, in a sign that "miners have been increasingly liquidating their coins on exchanges." Several publicly listed bitcoin miners collectively sold more than 100 per cent of their entire output in May as the value of bitcoin tumbled 45 per cent, an analysis by Arcane Research found. "The plummeting profitability of mining forced ... (full story)