If all paper money were change into Bitcoins, can it be access and use by everyone? how can the beggars access Bitcoin?
They don't, reason being, bitcoin isn't a tangible currency you can walk around with and drop in a beggars plate. beggars don't have access to the most important requirements needed for bitcoins i.e, internet connection and a medium, in this case, laptop or phones. I bet most even don't know there exists a digital currency.