I have seen a lot of people get disturbed whenever they see dumpers dumping the coins they have at unreasonable prices. To my amazement also, some people might dump a huge amount of token for just a penny, as if their whole life depend on it.
Whenever this happens, either as a bounty hunter or as an investor, i usually do not get bothered. Most times when a project is newly listed on exchange, i would avoid being in a rush to sell, but wait to see what would be the stable price, before the take off.
If the price goes very low due to dumping by dumpers, instead of grumbling or being disturbed, i will buy as many as i can and wait for the next pump.
Most times i had the opportunities like this, i was able to earn profits not less than x3 the price I bought from dumpers.
It works and you too can try it. I believe it will work for you.
This is not always true and cannot happen with every coin. If the project is not strong enough, its listing value will always be less than its ico price, if no one is buying that coin. The project may even get delisted from popular exchanges if it does not have good volume. So, I think your strategy might not always work.