The wrose mistake in gambling is that i decide to trust a HYIP. It has been running for 1year and 6 months. And i happen to keep seeing a lot of people praising about this system and it is really a legit company. So i decide to give it a try and it does really pay out every day. I even think if it is fake, i may be able to make some profit before it goes burst. I end up losing money.
How can you call making foolish decisions as gambling,these sort of investment scams are there for a very long time and it is not gambling 
The worst decision anyone could make in gambling is to keep rolling when you have lost a fairly large amount of money thinking that they could recover it and i have done that in the past and i have seen high rollers doing mad rolls and loosing everything.