The death of bitcoin. No real world use case to buy things from a major retailer. Walmart knows that taking payments in BTC would be even WORSE than paying merchant processing fees...
Did Bitcoin flourish because some big retailers in US started accepting them? What a stupid statement!
Bitcoin is not a great option for merchant payments. It takes time but it also protects your privacy. Bitcoin didn't grow just because it is accepted by the big retailers. It grew because of the community backing it and its privacy.
I am sure Walmart has its own reason for ditching the payment processing aggregators who charges around 2% on every card payment. Probably their cost model cannot accommodate that additional 2% of outgoing fees. But what to do with Bitcoin here?
Bitcoin is a very different ball game!