Will probably get brought for 3-4B by bigco if bigco can transcend internal politics. Not sure who will buy them - most probably Microsoft under Ndella.
I'm asking in all sincerity - what does Dropbox have that Microsoft would want? Their OneDrive technology is "good enough" for the vast majority of users.
Latest statistics I could find were that DropBox has 200,000,000 users and that 96% of them were free user accounts. That means DropBox has about 8,000,000 paying users. Instead of buying the company for $4 billion they could instead pay each paying DropBox customer $500 to switch.
Or they could spend $4 billion on marketing / giving away their free 1 TB of OneDrive space with purchase of an Office 365 subscription for $6.99 per month.
I'm probably missing something?