According to the article, the CEO said that " but I think bitcoin could surpass the dollar as reserve currency within 10-15 years." Bitcoin will surpass it's use against the dollar. It will be great if the majority of the people around the world use Bitcoin. If that happens, I think that will be the start of the  ruling of Bitcoin. The wallet will be a reserve, instead of having banks to be used for storing your money.

Then at that time in the future, Bitcoin has surpassed the dollar.