Why people these days keeps looking and asking what is the next Bitcoin and the likes? Every cryptocurrencies has its own use and has their own specialty and different purposes well it's really hard for me to summarize it but if you would like to check here's an example on what's the difference of bitcoin and ethereum

Link: https://www.investopedia.com/articles/investing/031416/bitcoin-vs-ethereum-driven-different-purposes.asp

What I'm just saying is that why do people look for the next bitcoin where in the bitcoin has its own identity and use and other cryptocurrency has their own use. It's like a fork and spoon they're use to eat and bitcoin and ethereum are cryptocurrency but the fork can't be used in soups and spoon can't poke or prick a meat just like bitcoin and ethereum there are things that bitcoin can do but the ethereum can't and vice versa.