I guess that it's not about the percentage, but it's about how cryptocurrency being accepted by the merchant. I think that statistical is not the right number because we never know how many of them.
But if that 10% is right, then I think that is great since we can reach that number so far and I am sure that the number will increase in the future.
Cryptocurrency soon will reach more merchant, and they will use cryptocurrency especially bitcoin as the next new payment method so people can use cryptocurrency to buy something.