#Proof of authentication
Bounties in: facebook, reddit, purchasing campaigne
Bitcointalk username: eldokoh2
Eth add : 0x9013db2C58f9FF6432396b546077947d2939AedB

Soon. We will stop using cash. Money has evolved over the years. From trade by barter to gold and then coins till we have cash today. I strongly believe that cards and chips will replace cash in future. All you'll need is your pin to verify transactions. If this happens it will greatly involve the use of blockchain and cryptocurrency in general