FOCUS-As bitcoin world wobbles, mining rig company plans $2 billion IPO
May 21, 2018 at 20:30 PM EDT
HONG KONG, May 22 (Reuters) - Bitcoins are worth less than half of what they were in December. Mining them is 60 percent less profitable than it was in 2017. Even retailers of hobbyist mining rigs say they are seeing fewer customers.