Since some nations have recognized bitcoin as legal tender, it is now possible to buy goods and services with selected countries. The majority of people prioritize bitcoin as an investment, so adoption is increasing. However, I don't think that bitcoin will cease to be a global currency after all some leaders still prefer to use their local currencies because that is what they are used to.
Bitcoin's volatility makes it hard to become a daily currency, especially in small amounts of transactions. But Bitcoin is still a decade-year-old currency and is becoming more popular day by day. The time will come when its price will stabilize.
And Bitcoin becoming a legal tender doesn't mean making local currencies disappear. Bitcoin will become another currency option which is would be great knowing we can use a decentralized currency.