Well of course the obvious, it banks the unbanked and arrive 6 billion people who normally cant afford it to have a monetary system/payment system and are excludet from the world. For me as a blessed westerner which have all the Luxus our corrupt and old but for the User smooth banking system gives me there is one big Personal advantage. Far to often i want to make a transaction at the weekend or in the evening and have to weit a day or the whole weekend Till i can send or recieve anything because the bank working day is over. With Bitcoin i can send and recieve 24/7 and with lightning without waiting.