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?
I personally don't know many people that use Cash for "large" purposes. Cash still has some advantages over BTC atm, for example it is much easier to transact in cash when you do not have access to an internet connection.
Another advantage of cash it it's relative anonymity as it generally cannot be traced and it is nearly impossible to determine who had/spent what exact dollar bill