Yes there are so many coins available in the current market of crypto currencies which dies not make profit for traders now a day, so in this case the all crypto investors should be very careful about choosing any coins for trading.
Why end up choosing them at all when you have bitcoin which is good enough to be bought at the low and sold at high? Wasting time on altcoins which never perform anything good means wasting your resources on things that are already failed. Instead put that time and money in other sectors like Stocks, commodities and bonds. Its good to focus on other sectors instead of crypto for a while too. Good for the mind too.
And if a person want to make his investment safe and secure then he need to start investment in bitcoin because it is a good coin and it makes good profit for the traders.
For crypto only bitcoin is what I suggest. But you can surely put in money in altcoins, but there is not guarantee to give a big profit or a stable price rise.