Bitcoin miner MARA has been on a buying spree, acquiring over $1.5 billion in Bitcoin in the past two months. This was funded by two convertible notes, boosting their holdings by over 50% this quarter and nearly 200% this year. As of December 18, MARA holds 44,394 BTC, up from 26,747 BTC in the previous quarter. The company raised $1.925 billion through zero-coupon senior convertible notes, with proceeds used for Bitcoin purchases. Other companies like Hut 8 and Riot Platforms have also been active in the market, highlighting a trend among crypto miners.