Not really bro. I know people personally, and have heard stories of many more, of multi million dollar fortunes amassed by countless members of the under 30 crowd.
Hell, go to any big city (Scottsdale, Miami especially) out to the clubs and see what cars the tech guys, ball players, music biz people, and real estate investors are driving. Fcars, Lambos, Maserati, tons of Bentley, Fisker Karmas, etc.
Age is not representative. Like others have said, how you dress and carry yourself....
Lol to ad infinitum above!