And yet the value of the bitcoin is 15,000 one day, and 10,000 the next.
Has your dollar ever been worth 66 cents the next day?
Nope, my dollars have only ever decreased in purchasing power and there lies the problem. With your reasoning anyone who buys and holds gold or any other precious metal is a globalist that is hurting the US dollar. People are buying bitcoin for many of the same reasons they buy gold.
Bitcoin is volatile because crypto currency is in it's infancy. This is true of almost all emerging markets.