What you see on the surface — the transactions — are just constructs. They’re a specific way of mashing up the elements that creates something that kind of looks like a bank. Which is great because if you’re new to bitcoin and someone tells you, "Well, there is an account, a sender, and a receiver,” you think, Okay, I understand this. Then you learn that you have a wallet, but your wallet doesn’t have coins, it has keys, and those keys could be copied, and now you’re thinking, You’re losing me. This doesn’t quite match my experience. Things get complicated because bitcoin isn’t what you think
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