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I was under the impression that miners earned coin from the blockchain (creator/owner/pool) or "Created" the coin they are paid?? But I see now that fees are involved to buy/sell/transfer.

For example I had $21 dollars left in in my wallet and wanted to transfer it to GDAX, I was not able to because of insufficient funds to transfer.

Can someone explain how this works. (seems very expensive)

closed as unclear what you're asking by Nate Eldredge, Steven Roose, Andrew Chow Jan 13 '18 at 20:09

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It is quite simple, you pay the miner a fee as part of your transaction to encourage the miners to include that transaction in a block. Block space is limited so larger transactions in size rather than value have to pay more fee.

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