Well they aren't especially tech-savvy, but I share files with them so they have it installed because of me.

My point is that at the rate at which it is growing, it literally is just a matter of time before all your coworkers and parents are using it.

It provides a peace of mind knowing that you can easily access your files - that is difficult to find elsewhere.

As technology continues to proliferate and more lives move online, people will likely use dropbox.

The more people that use Dropbox, is the more profitable they will be.

That is to say, their profit margins increase with the number of users they use - and that's not just because their unit costs decrease.

It's much more than that.