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Bitcoin. Bitcoin is the currency of the Internet: a distributed, worldwide, decentralized digital money. Unlike traditional currencies such as dollars, bitcoins are issued and managed without any central authority whatsoever: there is no government, company, or bank in charge of Bitcoin.

Wouldn't this meant it can not be taxed?

That is a non sequitur. It does not follow that because bitcoin is not fiat or centralized you should not expect to be taxed on fiat gains you make with it.