yes in the near future bitcoin is becoming a global currency,because bitcoin is not backed by gold either, but unlike traditional currency, there is a maximum limit of value to be created out of thin air. Once the supply cap of 21 million Bitcoin has been reached at some point in 2140 no more coins will be generated. According to most investors, Bitcoin is a superior investment vehicle, as scarcity usually leads to an increase in value.
As the halving just approach, the amount we get by solving a block is half-ed, so it shows that the Bitcoins are getting more limited, and as you say the when the thing is less in amount it has high value and worth..., so the Bitcoin are also getting a better price, I think after a certain year we would be lucky to have a coins on our wallet, Its a good investment and BTC has high chances of being global currencies....