<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjQtMDcvOTBmMTZmZjEtMDY2Zi00YTg0LWI0ODQtMDE5YjNiMjA2YTE3LmpwZw==.jpg"></p><p>US mining firms are confounding pre-halving expectations by hodling the BTC they mine. </p>