> using GPUs creates a self serving cycle: Difficulty goes up, more GPUs are bought to counteract that, repeat. This isn’t helped my the monetary reward for doi

> using GPUs creates a self serving cycle: Difficulty goes up, more GPUs are bought to counteract that, repeat. This isn’t helped my the monetary reward for doing so. Not quite. Price continues to go up, courtesy of Tether, which makes the mining rewards more valuable. This encourages new miners to join the network which pushes difficulty higher, until the difficulty level rises such that every unit of output costs more to produce than its worth. Then it's no longer profitable to mine. But again, Tether has no choice but to keep things pumping.