Apart from top coins in coinmarketcap, a majority of other coins might likely not have good future with a bigger number going to most new altcoins, this is the way I see it. But however, to invest in any coin or project, one of the most important things to have at hand or to know is the team, who are they and what have they achieved. It is from the team that everything comes from, such as exchange listing, seeking for partnerships etc, therefore their level of experience and so on will determine if the project will have a bright future or not. Coins like BTC, ETH, BNB, ADA, XLM are good and have bright futures.