Bitcoin broke above USD 40,000 on Wednesday and headed for another attempt at breaking from its month-long range as short-sellers bailed out and traders drew confidence from recent positive comments about the cryptocurrency by high-profile investors.

Bitcoin was last up 1.7 percent at USD 40,149 while rival cryptocurrency ether rose 1 percent to USD 2,328. Bitcoin is within a whisker of rising through its 100-day moving average.

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