The bigger the risk, the bigger the gain. If anybody is afraid of losing then put the money in a bank or in a vault no risk no gain. Take the risk if you succeed you will be happy if you lose you will become wise. it's a win win situation. But offcourse it defends on how you absorb the situation.
For my opinion yes the bigger the rial the bigger the gain of course that is actually what is mostly happening in this field but of course there is a risk there is a possibility that you lose life is always at risk it is like a gamble because there will always be a chance that you lose a lot of money and of course if the price are high they will not gave you that easily if the price is too good to be true the hindrances will come to way but that is not always happening sometimes they are just a scam.