I have seen many people strive for the money and make it but then blow through the money quickly and be basically in the same position as the one they started in.
Don't do a startup for the money because if that's your main motivator, it likely won't work out. To anyone who doesn't have the kind of mental illness required to put themselves through life in a startup (anyone who wishes for long hours, continuous stress, a feeling that how much you do is not enough even when you win is probably some form of mental illness but I figured it's easier not to worry about it as I can't change it) probably shouldn't.
That said, if you have an idea that keeps you at night, or a problem that annoys you so much that fixing it is easier than letting it continue annoying you, then go ahead. I am the kind of person that sees something not working and think "I can fix that" which, for some problems, eventually moves to "I HAVE to fix that"... and all my startup entrepreneur friends have the same kind of feeling.
... but yeah, the financial freedom makes things easier. Wealth, however, didn't at first. A lot of money at a young age was really tough to manage. IF you happen to get the lucky gold ticket, don't touch the money for about a year. Just see what MODEST improvements you want to make to your life instead of going out and blowing the money. That way, the money will last longer and ensure that you can live worry free and build the next great startup.