Bitcoin ‘halving’ could deal a $10-billion blow to crypto miners

For enthusiasts of Bitcoin, a once-every-four-years software update called the “halving” has long been held as one of the keys to propping up its value. This time around, it’s also set to trigger multibillion-dollar declines in revenue for the very companies that ensure the digital currency‘s smooth functioning, right on the heels of a surge in their biggest costs.