He will AMASS a large amount of money for his investments.
"a prudent investor can amass a fortune in the stock market over the long run." this sentence does not belong to me, i did not come up with it.
the farmer amasses the hay to make hay bales.
the crowd amassed for the parade
(Amass - to heap together, pile up) "By working hard and spending little, he managed to amass a fortune."