This is true at early stage when there aren't many clear signals. When this is happening at the middle/late stage, where there is a clear market (created or exi

This is true at early stage when there aren't many clear signals. When this is happening at the middle/late stage, where there is a clear market (created or existing), a mature product, and years of numbers/traction/track record to go by, then it puts ecosystems in a fix. That is what the tweet also points out. This is another advantage silicon valley likely has. There are more funds in middle stage who would lead a round and gives confidence to early stage investors to not look at much of the existing competition, unless it's too crowded a space.