or think as : a cat is a cat a dog is a dog....
Yeah but this tells me nothing of it's comparative value. Obviously 1 BTC is 1 BTC. But using BTC vs. USD (1 BTC = $93,000) tells me what it's worth in goods and services. It's not that hard to understand.
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it means, you can not compare one vs the other a cat is a cat and not a dog
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Obviously a Bitcoin is not a dollar, duh. Without comparing it, how do you know what you can trade it for though?