it depends...
I day trade and have a small account. I am also younger with few obligations. So in theory I could go b**** deep, to scratch a few halves of a percent even, with the firms entire alotted bankroll even. havent gone 10x yet or added the homies life savings, but if it was a bet I thought the risk was worth it I may possibly take such a leveraged position. For example, no way in Hell I would go all in a lowfloat momentum play short or long even with my favorite enemies bankroll, not even half my account, again still daytrading small account two completely different answers.
If you tell us your risk tolerance (this is a personality thing), max acceptable drawdown (this is preservation of capital thing )& goals (this is what you expect to get from this venture) than we can try to answer that first question.