It is not wise to invest all your saving on any I investment no matter how lucrative or promising such investment might look at the beginning. There are inherent risk in any investment and you have to determine the risk and be willing to accept how much of the risk you want to take.
I agree, investment is very high risk matter you really need to study first before entering or joining whatever business. It is not also advisable to put all your profit in just one place, cause if something happen wrong, all your profit will be loss in one place, so it's better to divide your profit in different investment so that you still have other resources in case that your other investment failed.