I think you are very confused with Bitcoin. Bitcoin is an asset, just like your car. Once you sell it, it becomes currency. You can also trade Bitcoin or your car for something else you want by stating a price for each of them. Currently, the Bitcoin price is $26k per coin. So in exchange of 1 Bitcoin, someone can give you his car worth $26k. That surely works as a currency, isn't it? It's modern Gold. You stack it up for a better future.