Nice advise. I agree but depends who is investing. If a person already has a lot of money why would he care then? There was a time when i used to spend a lot in gambling but realized it later after loosing a hefty amount. I remember my time so to avoid any kind of personal problem, one should take it as fun not completely become dependent upon it. It can ruin your whole life. If you really want to make money through gambling, just begin with small amounts and use that again and again to multiply. Even if you loose, you wont have any realization or pain on your heart.
I agree with you, besides starting with a small amount and making it grow gives a lot of pleasure because you'll see that you are making a better play that even in such a small amount of money you did make it grow. Additionally, we must have already a certain amount to gamble before we start so that we could avoid losing more of our money.
It means you better know the end of gambling, because you have lost a lot of money. This is the bad thing in gambling that when you go in debts then you understand the worseness of gambling. Gambling always has bad effects and you will never be happy when you quit gambling at night. Casinos are like a robber, who takes your money and you can do nothing.