You should only play with money you can afford to lose. When you have money coming from a loan, you are forced to protect it, and under pressure to win, you will eventually fail because the house always wins.
Very true. We should gamble with the amount of money that we afford to lose. It is a very risky way to take a loan because the chance for the return isn't quite high. Mostly gambling just relies on the luck, we can ensure how much we can earn money from gambling. Meanwhile taking a loan, it means we have the responsibility for the repayment and the interest, too. This is surely to be a pressure for us. How we can gamble with calm mind if we have that high pressure? Gambling with no calm mind probably leads to easy losses. Since I gamble for fun, I totally avoid taking a loan.