Mark Cuban is certainly a renowned Angel investor, but not a VC.
> For instance, Uber moved from $17 billion to $40 billion between the two funding rounds within six months.
Amazon, a public company worth ~200B billion dollars, is up 40% in value in 5 months this year. Valuations can change very quickly in technology companies, whether public or private.
> This bubble is bound to burst.
Ok, well I guess that settles it!
> Take Uber and Airbnb for example. Both co-founders ... wealth was calculated on the basis of notional post-money valuations, figures far in excess of what these companies could actually be sold at in the market right now.
Uh, says who? Both of these companies make tons and tons of money and have business models that make sense. Whether or not they are good for the world, they are certainly good businesses. What makes you so sure the valuations are wrong? All of the late-stage investments in Facebook worked out pretty well.
> VCs will most likely walk away with their invested money, if not more.
A VC who returns the initial fund amount (or even a small gain), over 10 years, is losing their LPs tons of money to fees and inflation. LPs will not invest in that fund again, and one bad fund has ended a lot of VC careers. Granted this is probably good for the world, but not for that VC. Saying a VC has liquidation preferences and thus they are immune from any negative consequences to a bad investment is ridiculous.