Quote from: lombok on Today at 09:58:23 AM

Quote from: AprilioMP on Today at 09:03:27 AM

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The legal means of payment determined by the state are fiat currencies such as USD, Rupiah, Euro, Rubber, Yuan, Yen and so on. However, if the exchange or bartering depends on both parties, if you want to barter with a friend regarding goods or services, that is also legal (for example, bartering gold and shoes or gold with other collectibles or collectibles with collectibles). However, when it comes to legal payments, the only thing that is determined by the state is to use the fiat currency of each country.

In relation to the general definition of money, do you think it is correct as I know it?
Money is a legal medium of exchange and is recognized by a country, such as the types you mentioned, starting from dollars, euros, rupiah and others.

Quote from: lombok on Today at 09:58:23 AM

Before the fiat currency system was in operation, the coins used were gold and silver or a barter system was used.

Gold and silver were the means of exchange in ancient times, history confirms that they were often used in the barter system.
Let's return to the discussion of money and the OP's question about why Bitcoin is not money. For me, Bitcoin is money that can be used as a medium of exchange to buy goods for those who use it.