Sam Altman has already explained why late-stage private valuations -- but not earlier-stage or public valuations -- are bubble-like right now: >To summarize: there does not appear to be a tech bubble in the public markets. There does not appear to be a bubble in early or mid stages of the private markets. There does appear to be a bubble in the late-stage private companies, but that’s because people are misunderstand…
Platforms like Angel list are helping fund allot more companies at the seed stage by having syndicates.
Now even non-accredited investors will be able to invest in startups[1]. So the seed stage is bubbling up.
http://www.usnews.com/news/business/articles/2015/10/30/sec-...