Uber Investor: The Bay Area Bubble Will Pop This Year

This doesn't seem to make sense. If he really believes that there's a bubble that's about to burst, why is he invested in all these companies? Does he think that somehow the companies he invests in won't be affected by a bubble but all the others will be?

Having lived through the dot-com bust of 2000, I remember that even blue-chip tech companies like Sun and Cisco suffered very steep devaluations of their stock prices. OK, they weren't completely wiped out like the internet dogfood delivery companies, but anyone who invested in them near the top of the market quickly lost a lot of money.