What is Bitcoins endgame?

So 1 BTC is 1 BTC, and it’s monetary properties are truly remarkable. Durable, divisible, portable, interchangeable/non-mutable, scarce, secure, decentralized, etc.

But what’s the end game? Is it to be the world reserve currency, or to remain as an alternative asset, is it to be used as a store of value, etc?