The price of Bitcoin as denominated in tethers is increasing (supply/demand as people attempting to exfiltrate value to a safer asset) and Bitfinex has quite a

The price of Bitcoin as denominated in tethers is increasing (supply/demand as people attempting to exfiltrate value to a safer asset) and Bitfinex has quite a lot of Bitcoin, both their own, their reserves, and other people's, so they can hold a peg until they can't, making trading profits all the way, as long as their counterparties and regulators let them.