Last year, miners struggled to buy enough rigs. Manufacturers couldn’t fulfill orders fast enough. Now, Matt Schultz, executive chairman of bitcoin miner CleanSpark (CLSK), figures 250,000 to 500,000 mining rigs are still sealed up in boxes in the U.S. alone, based on his conversations with analysts. Ethan Vera, chief operating officer of mining services firm Luxor Technologies, put the number at 276,000 worldwide in September.
