Absolutely great and necessary reading by Bartosz Jakubowski

I would add one sin

Lacking conviction

A lot of VCs concentrate on following up on other VC’s deals , considering that a deal is less risky if others invest in it

This creates a concentration of money but limits the number of brains actually thinking about what the best investments are

It probably fits in #lazyness but I think it’s one of the most dangerous trends of them all.