The Chicago Mercantile Exchange CME) released data showing that open interest in bitcoin futures is not only rising but reached an a new all-time high, according to a Twitter post on June 18, CoinTelegraph reports. The Twitter post said that bitcoin open interest spiked on June 17 with an all-time high of 5,311 contracts totalling 26,555 BTC, or approximately $246 million at the time of the news release.