When Valve first started accepting Bitcoin as an option for Steam purchases last April, the cryptocurrency was trading around $450. Today, with Bitcoin surging past $12,000 per coin, Valve has announced that "Steam will no longer support Bitcoin as a payment method on our platform due to high fees and volatility in the value of Bitcoin."
Transaction fees charged to customers using Bitcoin have surged throughout 2017, Valve says, peaking at $20 last week from a starting of about $0.20 when Steam first started using the currency. With Valve unable to control these blockchain-linked costs (passed on from third-party Bitpay), the company worried that it was leading to "unreasonably high costs for purchasing games when paying with Bitcoin" (though apparently these are costs Bitcoin users as a whole have been willing to shoulder of late).
Bitcoin's extremely volatile valuation has also gotten in the way of its usefulness for Steam users, Valve said. With Bitcoin values changing so rapidly, the amount of Bitcoin needed to cover a purchase can change significantly between the time a purchase is initiated and when it's completed. Fixing this situation with a quick refund or a request for additional payment incurs more of those high transaction fees, Valve says.