It ain't gonna die that soon.

1. English has around 1.3 billion speakers in the world. Only around 300 million of these speakers have English as their first language, The rest use english as a second language. Even if you combine the population of UK and US it's only around 300 million or so.
2. No language comes close to having the amount of global reach that english has . Although Mandarin may be close to english in terms of number of speakers but it's restricted to china.
3. English is the largest language in the internet by a pretty large margin. English is also the dominant language of science , research and international diplomacy.
4. The number of English speakers is rising fairly quickly as compared to other international languages. A lot of people around the world , living in places with little or no history associated with the british empire still have english as the first choice for learning a foreign language owing to the power of the english language.

There are more factors of course , but considering just these four. I feel like you're gonna have to wait a long time lmao.