What is bitcoin? Earn some free with Coinbase.
Flip a coin 256 times, write down the result each time. Give each side of the coin some random value. Multiply each flip by the current time and then add the values. Give a trusted friend the value of one side of the coin. Keep the other side of the coin a secret. Now, only use that type of coin to buy and sell with people you trust. 
Remember to add 2FA to your virtual wallets! https://www.coinbase.com/join/59de12062177a900dbe799eb
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