Odaily Planet Daily News According to F2Pool data, as BTC fell below $55,000, only five mining machines remained profitable at that price, namely Antminer S21 Hydro, Antminer S21, Avalon A1466I, Antminer S19 XP Hydro and Antminer S19 XP, with shutdown prices of $39,581, $43,292, $48,240, $51,456 and $53,187. (The Block)