Go buy a hotdog on the street shop and pay him with paypal
LOL, now yes i got your point. bt why do we still use cash for larger transactions?
Describe "large"
I personally rarely use cash anymore. From food to gas to buying something else, I use my debit/CC's. In the very near future I hope to use my Bit/Lite cards

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Well you must belong to some developed country. In my country we use a lot lot of cash, and the problem that arise is that fake currency also gets supplied to our country which results in loss to our economy.