How much do you know about your great grandparents?
Because in 50-100 years, that will be how much the world knows about you.
Edit: for those of you stating that information storage and accessibility will allow everyone to easily look back into the past, I challenge you to run a game designed for Windows 95.
Point being, information storage is not a ubiquitous system and as the architecture of software and hardware changes there is certainly a possibility that some systems will require specialised tools and equipment to acess.
Furthermore, social media is the highlight reel of history, not the story. Very few people show their true selves in their twitter or Facebook feed.
Also a number