Dropbox would have been my next closest to the bottom on that list, and while I think a $200B valuation on its own for Dropbox is a bit outlandish, it's conceiv

Dropbox would have been my next closest to the bottom on that list, and while I think a $200B valuation on its own for Dropbox is a bit outlandish, it's conceivable. I thought about it like this... Would I bet that every company on this list will do worse than doubling their valuation over the next 5 years?