Most of the coins that are ranked high, these are often the potential coin and development team are always very good, they always have many plans to develop in the future, we choose them, we will receive great benefits. Now is my own experience, I usually evaluate a coin is good or bad depending on the community of that project, if they have a strong community and always support the project, the development trend in the future will be huge, then the field they contribute
I disagree with you, coins on the present top right now are coin that already developed and it's not worth to invest in if you're a big-think man or else you won't earn good profits as bottom coins can give to you. So i guess better to select the bottom coin which is potiental to invest rather investing top coin right now.