Buying a coin because it is cheap is not a wise thing to do, the reason being that you might not know what the lowest price could be. It is possible you buy and the price continues to fall. So instead of buying with the price in consideration, buy the value. A coin with value will have good products. A product that is needed by investors and those who would like to use it. Although, you might be fortunate to buy it at low price, which then increases your chances of having more profits.
There are a lot of coins that are making good progress in executing their business plans and are trading at a small percentage of the cash they raised in their ICO. It is not difficult to find serious bargains in the market that have the chance to jump by multiples in value as market sentiment changes.