[Defiance Launches 2x Leveraged ETF Tracking Mining Company Bitfarms] BlockBeats News, December 30, according to Globenewswire, ETF issuer Defiance announced the launch of the 2x leveraged ETF Defiance Daily Target 2X Long BITF ETF (BTFL), which tracks Bitcoin mining company Bitfarms. It is primarily aimed at traders seeking to amplify short-term bullish returns on Bitfarms.