Bitcoin has been accepted by several well-known platforms such as Mastercard and Visa, becoming the world's currency leader is very complicated because many factors must be faced, the government, agencies, and finance departments will audit the existence and circulation of Bitcoin in each country.
For now, seeing Bitcoin as an investment and payment on several financial platforms in my opinion is enough because there are still other things we need to do, namely introducing Bitcoin to everyone, so they know Bitcoin can be used as a payment system.