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The same way that any currency has value. The value of a currency is determined by those who spend it. When two people decide to use a means of payment and other people want to use that same payment mode, then the early adopters Decide to hold their currency till someone gives it a bigger value for his money. So we all determine the value of a currency through bidding and asking. Simple trading is the price determinant

Perhaps because of the concept of accountability. A public ledger. Cryptocurrency is putting power back in the hands of the people :D

thanks for your valuable comment.

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