In any investment or even gambling, it is best to use your spare money which is different from your savings and your emergency money since anythinf can happen and you will just think of that money as for entertainment purpose only. That means it is the amount in which intended for throwing, it also means if that amount lost, you won't have a hard time accepting such losses.

One thing I commonly noticed about investment and gambling is that, people used to expect too much out of it. That also means the thing called "EXPECTATION", is the one responsible why people always be tempted to greed.