Many great businesses were started by founders aged 50+.
"The average and median age of U.S.-born tech founders was thirty-nine when they started their companies. Twice as many were older than fifty as were younger than twenty-five."
Cites: https://smallbusiness.yahoo.com/advisor/older-entrepreneurs-... ; http://www.kauffman.org/what-we-do/research/2009/04/educatio...