Are Mutual Funds as Big and Prosperous in other countries as they are in the U.S?

I love Finance and am always trying to find my path in the Field. I’m still in college , but I want to work abroad and I Mutual Fund seems like something I can look forward working for or opening one of my own in the distant future and was wondering if I would have to take a big oppurtunity-cost pay cut to open or work for one abroad.