Walmart MoneyCard can even be used to purchase BTC here on Paxful. Here's how. First, create and verify your Paxful account, then head over to the “Buy Bitcoin”. Pick one of the many offers listed by vendors for selling their BTC using Walmart China Card or create your own offer to sell your bitcoin for Walmart China. Walmart has partnered with coin-cashing machine company Coinstar and crypto-cash exchange Coinme to install Bitcoin (BTC) ATMs in its.