As a former Dropbox user, I can't imagine investing in them. For me, their plans are just way out of line with regard to pricing. So out of line that I'm going to go to the trouble of moving all of my stuff to Google Drive or OneDrive. And I hate their ransom policy of giving you free space for a while due to phone promotions or whatever and then taking it away. You are screwed and can't access your own stuff until you pay the ransom. I just don't think a company formed on those sorts of policies and pricing strategies is a good investment.