Oh sheesh.
Please Google keyword leverage. It makes millionaires.
I have a degree in economics, I'm well aware of leverage. I'm also well aware of temptations and frivolous spending when you're young and often single with no real responsibilities. And I've seen friends who bothered to invest blow through a lot more money than they were putting away and end up a few years later back at a crappy desk job commuting in traffic in a Camry instead of a Porsche. It's a lot easier to sell some shares than it is to bother to do a cash out refi on your home that you own.
And I can't think of anything worse than getting to 35 realizing that you flushed everything you once made down the toilet with nothing to show for it.