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It is not right to call Bitcoin only a war currency because it can be used in any way in human life, but it will definitely depend on the use of people. If someone prefers Bitcoin as a currency to buy and sell war materials from abroad, then in that case it can definitely be considered a war currency. Again, if someone reserves Bitcoin as a reserve currency, can it also be considered a reserve currency. That is, Bitcoin can be named based on whatever purpose it is used for.
The understanding you provide is very appropriate because when Bitcoin can be used or utilized in several things, it does not mean that we have to call it a certain currency because it can be utilized by its users in certain things such as war and so on. For me, Bitcoin is still Bitcoin and does not deserve to be equated with any currency in the world even though Bitcoin can be used to buy something and can be exchanged for all currencies in the world through any exchange. So considering Bitcoin as a war currency is very inappropriate and for me it is a mistake for those whose understanding is still quite limited.