The first thing that impressed me about Bitcoin was the ability to trace where the money I gave to my child or to the government was actually spent! Just imagine: being able to check what taxes are really used for! That would truly be a revolution!
This is purely the truest dream that ever came through unlike what you can't find in any other financial system, no companies had ever made customers see what's going on in another users transaction history but can't touch his portfolio, that's absolutely amazing but built trust with it's users.