Before taking the loan you'll have all the believe that you can replace the loan in time but after taking the loan and you make one mistake from any of your trade, you'll become anxious and you'll begin to make wrong decision, making you to lose all the money you have borrowed. There are some people that are very good at managing risk and they'll be making profits and getting more money when they handle people money but not everybody can do that hence you shouldn't think that you can get the same result as them but keep to yourself when you're out of capital and only resume trading again when you have gotten some money of your own that isn't important for something different than trading. Trading has no certainty because the market moves on it's own without anyone controlling it.