It is not as simple, the best altcoin to invest is not the one someone on the internet recommends to you, it is the coin that you have studied the most, I have seen a lot of people investing in coins they did not even knew that existed the day before, investing like that is just a mistake, you need to invest in coins that you have analyzed and that you know everything about them including every single update, if you do this profits will come but this is hard work and most people do not want to do it.