Instead of wait Ebay accept the cryptocurrency, I think wait the best services seller online is Amazon will be better. To be honest, I like to using Amazon to order from other countries than Ebay, because Amazon services can guarantee the product I bought better than Ebay
I do not believe that Ebay will actually use some block-chain other than for marketing . Which could mean something like PayPal allowing to change bitcoin to fiat and than paying with high commissions.
Overall I like Amazon more they are more dedicated and more innovating company. But in my mind they have so many problems, it is incredible. The shipping time ( as a seller) cant be changed to real one, they have some kind of crazy algorithm. This is just one example. Do not want to go off-topic too much.
Anyway I can see Amazon in coming years doing something with block chain. I think the stability of crypto is not a argument since you can buy and sell at current price.