I've considered doing something like this but it'll take more than just Kroger's API... It should show house prices, car prices, rent, fast food chains, doctor bills, etc., Basically track all things people buy over time and price them from Pizza day to the current time. Every view is graphs, no numbers unless hovering. I could imagine the UI having life priced in 4 columns: Fiat, Inflation-adjusted fiat, gold, and bitcoin. Maybe a 5th for the S&P500. There should also be some way to enter in a 'savings account' amount and watch how that would have performed over time. Now that mainstream finance is standing behind bitcoin, and laymen can now believe that it will continue to exist in the future instead of just crashing to zero one day, this data could get even the most careful noob to start saving something in bitcoin.