A good coin to invest on to depends on its project and product of it is benefical to the possible investor. A good project may attract investors and become a successful project in the future which may lead to an increase in price of its equivalent coin. If you are looking for a coin to invest on to buy those coins that have a good project and also study ita marekt cap and supply of the coin to know the price of the coin if it will increase or not. For me i suggest ethereum it is a good coin for me.