Bitcoin solved the Byzantine generals' problem in adversarial network contexts, by its innovative deployment of proof-of-work. Thus, bitcoin invented thermodynamically secured property rights, and property rights are a fundamental building block for human flourishing. Bitcoin provides a decentralized trustless source of truth, and none of the other cryptos do that because they're not nearly as widely adopted.
Bitcoin is a strong base layer that faster more anonymous payments can be based upon, such as Lightning or Liquid, and things like CoinJoin and PayJoin, which are trust less and noncustodial. You can't start with a squishly base layer and then build stable systems, but if you start with solid fundamentals, privacy and better user experiences can be built on top.
Bitcoin is also currently solving the natural gas industry's problem of flaring methane... portable mining rigs use the methane to generate electricity to provide network security to the Bitcoin network, while making natural gas extraction cleaner. Bitcoin mining is also incentivising and paying for the production of clean renewable energy on larger scales than anyone had figured how to fund. And some people use bitcoin mining to provide home heating in the winter. No other crypto is doing those things.