The cost of secondhand cryptocurrency mining equipment in China has nearly doubled in recent weeks as a result of bitcoins price jump over the same period.
The bull run that began in mid-April has made these machines more profitable to run and hence more valuable. According to blockchain data firm TokenInsight, as recently as April 8, an investment in most types of crypto mining equipment would take 200 to 350 days to pay for itself.
But bitcoins climb from the low $4,000 range in early April to well above $5,000 has resulted in a drop in the payback period (a miners price divided by its daily profit) for several secondhand models to less than 200 days.
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https://www.coindesk.com/bitcoin-minings-new-bidding-war