bitcoin's total supply can't be printed/inflated at will; in contrast to the US dollar whereas Jerome Powell of the federal reserve is going full on BRRR[1] on the US dollar.
Bitcoin is very valuable indeed because Bitcoin cannot be printed anymore, from the beginning until now the volume of Bitcoin is only 21 million Bitcoin will not increase or decrease. Bitcoin is not Unlimited like the US dollar FIAT that you describe that always prints the Fiat Currency so the price will not be fixed.
Bitcoin is an alternative investment for digital currencies with several advantages and disadvantages that are known by every investor.