Can you name a few of these superior tech projects your implying here?
new shiny tech is moot as its not a predictor of successful adoption by any means.
Theres countless example in adoption history having inferior tech winning.
A truly decentralized currency can only be invented once, and it has been done in the form of bitcoin.
No other project can ever replicate this decentralized organic slow growth ever, no matter what is being claimed. It would be instantly killed, coopted etc.
Its like with the wheel, it can only be invented one time only.
Next future form of money might be coming way later down the road maybe 100s of years after our time, when humans are an interplanetary species etc.
Lots of them, not a few. Ethereum, Cardano, Solana, Cosmos, Monero. In fact, many shitcoins are technologically better than BTC.
Adoption is not a solid premise to call BTC a hard currency or digital gold, because a new angle or gimmick can make people drop BTC and adopt the next shiny thing.
Say Amazon starts accepting cryptocurrencies for payment. But they only accept Solana. Well a lot of Amazon buyers will then get Solana for the first time, the speculators would watch SOL moon and they'll jump on the new bandwagon. So that's one possible scenario where BTC is usurped. But it can happen in all sorts of ways.
Unlike gold, which is a natural resource found across the universe for 7 billion years*, not a piece of code written by a human that will be old fashioned like the radio in no time. BTC code already looks old and it's only been a dozen years or so. Technology is a bad platform to use as a store of value. And a store of value is not what BTC was designed to be.
Yes a truly decentralized currency can only be invented once, but that doesn't mean the BTC as the first can't be usurped. Social media can only be invented once, but where is MySpace now? Even Facebook looks vulnerable to getting surpassed by competitors these days.
*Even gold looks precarious, lab grown diamonds have caused the price of diamonds to drop in value, and there is talk of lab-grown gold coming. Something to watch out for.