Bitcoin isn't tied to any single country. It's a system designed to serve people and is intended to function both as an hedge against inflation and a store of vvalue.  most people think of a store of value as something that is stable or not volatile. Many investors seek a safe haven by moving from highly volatile assets to those that are less volatile because Bitcoin is highly volatile, it can't be called a stable asset.
But it's volatility isn't coming to an end. As more investors rush into the market, the market reacts to every one of their decisions. This dynamic will continue even after all Bitcoins have been mined.