A couple of months ago I invested around $1,000 into an ICO, and to my surprise it was worth $4,000. 
I'm holding it though, so who knows what will happen in the future. With my luck it might go down to $500.
It is very important that you keep an eye on that coin and its development, you need to understand why the price of that coin went up, if there is not a reason there is a possibility a pump and dump group is manipulating the price and if that is the case you need to sell.I'm holding it though, so who knows what will happen in the future. With my luck it might go down to $500.