it is not making any sense if you are looking for some other project which is still not into top but having all the criteria of good coins. If you are referring only new project then probably you may not get what you are looking for because devs may make up their project according to your criteria to look like a highly potential one but over the time such coins will get dumped and will be categorized as shitcoins by this community. So, it must be a good practice to go with top coins of crypto space because that will have comparatively less risk and better ROI.
I am as well not bothering about new coins (coins which are not on top of the list in CMC) because that will definitely multiply my risks regardless of how much returns it may bring up later on. As per my risk assessment, before targeting huge returns, I must go for calculated risk; in this way investing only on top coins eliminate risks and ensures good profit in long run.
If you go through this forum then you will find that lots of people are always suggesting about investing only with bitcoin and there will be no need for going for any other coin even for diversification purposes. In my opinion they are alright and it will be proven right by time as well.