Investing in those top coins is still a good idea as they were on the market with their community's support that can attract more investors. We have a higher risk, unlike those newly completed ICOs, as those investors would dump if the price goes down. Even though not all new coins have that nature, it takes time to develop as I observed, and you need patience to wait for your profits.
Investing in top coins is a safe option for investors, but returns are very low. I think when we enter this market, we need to take risks and spend a lot of time to search for some new projects because it will be a choice that brings a lot of profits for investors. This year there will be many new projects for you and it will be a very good opportunity for you to consider investing.
Of course the risk will be much higher than the old coins but if you know the analysis, you will avoid unnecessary risks when investing. I have tried investing this way for many years and have brought me a huge profit.