It seems bitcoin has come out swinging against fiat currency — as one of the world’s largest fiat currency exchanges is offline due to a software virus. UK currency exchange site Travelex may be subject to ransom demands to get back online and protect its customers’ data; the attackers are demanding a six-figure ransom to be paid in bitcoin, according to Computer Weekly.

The world is moving towards cashless payment, and Asia is leading the charge with companies like Alibaba, Tencent, and Grab, and fast-growing mobile payment usage rates across the region. In China, more than 600 million people already use mobile payments, and in Southeast Asia, users are catching up fast.