this has nothing to do with them creating their own cryptocurrency though.
and the rise may not be not as much as you may think. of course it is kind of obvious that if the big companies start accepting bitcoin, the adoption will grow and the news alone will cause a big rise. but it won't be that big because if you look around there are currently big companies like Microsoft that do accept bitcoin payments. maybe not in the most obvious way but they do it. and price never "skyrocketed" because of it!