Your question depends on why do you use alts.every popular alts have their aims and goals for example ethereum focuses on running the programming code,its olso used by app developers and its better to use than bitcoin in this situation(olso it's not bad for trading too).. In my opinion its good that there are so many alts because there is  competetive environment and it causes to compete each others, wich will develop alts.I hope that,they you will find  applicable use of i