about the only thing I can think of that would be stupider is taking out a home equity loan to fund your trading account
Happened a lot back in the late 90's. Very few of those people lasted long.
On another note, I know a guy who borrowed 35k from credit cards to trade in the mid 90's. He is one of the very few who made money right away. He still trades for a living.
I think it all depends on how good you are. And how crazy you are.