How the second tech bubble will burst

This is the relevant bit:

> Fed has created abnormal market conditions by printing money and keeping interest rates low. Investors are looking for growth anywhere they can find it and tech companies are good targets - at these values, however, all tech stocks are expensive - even looking at 5+ years of revenue growth down the road. This means that most value-driven investors have left the market and the remaining 5-10%+ increase in market value will be driven by momentum investors. At some point there won't be any momentum investors left buying at higher prices, and the market begins to tumble. May be 10-20% correction or something more significant, especially in tech stocks. Facebook has continued to perform in the market despite declining user engagement and pullback of brand advertising dollars -- largely due to mobile advertising performance - especially App Install advertisements. This is a huge red flag because it indicates that sustainable brand dollars have not yet moved to Facebook mobile platform and mobile revenue growth has been driven by technology companies (many of which are VC funded). VC dollars are being spent on user acquisition despite unknown LTV of users - a recipe for disaster. This props up Facebook share price and continues to justify VC investment in technology products based on abnormally large mkt cap companies (i.e. "If this company attracts just 5% of users that FB has, it will be HUGE" - fuels spend on user acquisition as user growth is tied to values). When the market for tech stocks cools, Facebook market cap will plummet, access to capital for unproven businesses will become inaccessible, and ad spend on user acquisition will rapidly decrease - compounding problems for Facebook and driving stock even lower. Instagram may be only saving grace if they are able to ramp advertising product fast enough. Total internet advertising spend cannot justify outsized valuations of social media products that derive revenue from advertising. Feed-based advertising units will plummet in value (in the case of Twitter, advertising spend may not move beyond experimental dollars) similar to earlier devaluing of Internet display advertising.