I want to add more facts about this case. First, using bitcoin is better that using debit or credit card because there are no third parties whos we have to pay them for their service, the second one is bitcoin can increase our saving because we only need to pay transactions fees when we use bitcoin for our transactions as the anonimity that bitcoin have provided to us, it's mean we can avoid the taxation(actually I don't thing that avoid to paying tax is a good thing), the last one is by using bitcoin we can reduce admin cost which mean that our purchasing power will increase slghtly. I am sure that bitcoin is still better than other digital payment metode. Bitcoin will survive in cashless society.