4 kinds of followers

I have notices that there are 4 kinds of traders depending upon who and how they follow others:-

1) those who pick and choose whom to follow on the basis of some criteria, and then apply their own brains too,

2) those who follow the one whom they see many others are following but then apply their own brain also,

3) those who pick and choose whom to follow on the basis of some criteria and then follow them blindly,

4) those who follow the one whom they see many others are following and then follow them blindly.

While the first are Mature ones, the second are Amateurs, the third ones are Immatures and the forth ones are plain Foolish.