This Friday, the largest cryptocurrency market cap ranking website experienced some malfunction, which resulted in an artificial overstatement of the prices of several coins, some were overestimated by almost 1000%. Thus, the price of BTC went up by 12%, other altcoins such as Aeternity and Bitcoin Diamond went up by 951% and 876% accordingly. The reason for this was a price calculation error on Tether which caused any listing with a Tether market to become artificially inflated.