The fact that there have been thousands of attempts to repeat Bitcoin's success over the past decade or so and nobody has come remotely close I think answers the question. Ethereum is the only other big success and that's because it was the first to go for building an app network rather than be a currency.

Bitcoin was only able to become so decentralized and secure and widespread because it was the first and organically grew when there was no competition. Anything built after Bitcoin would have to compete with Bitcoin, and as we've seen that is always a hopeless battle for the altcoin. And now all anyone cares about is creating their own centralized blockchain or app token or meme token to try to get rich.

And I'd say its impossible at this point for another PoW cryptocurrency to achieve mainstream success because it will always make more sense to mine Bitcoin than some random cryptocurrency. And nobody has yet discovered a good really decentralized mechanism besides PoW. Even the few times that people have actually tried to go for the open source decentralized leaderless route of making cryptocurrencies (and its literally only been a handful of times at most) those cryptos have never succeeded because the world already has Bitcoin so doesn't need them. I think around 2019/2020 when LTC finally fell off from being one of the top cryptocurrencies that proved the market had decided that we only need Bitcoin. It had long been considered the 'Silver' to Bitcoin's 'Gold'. Which makes sense because there really is no reason to have a second or third actual crypto-CURRENCY (not meme token or app token or smart contract platform, but actual global money) when you already have one that does everything you want it to, which of course is Bitcoin.

So no it won't happen. Because of a combination of (1) we already have Bitcoin so we don't need another, (2) Bitcoin's creation was unique and groundbreaking and the first of its kind so it captured the mind's of people and had no competition, (3) most creators want to get rich, not selflessly create a global currency with no leader or control over it, (4) for a second Bitcoin-like invention to occur it would have to be so vastly superior to Bitcoin as to render Bitcoin useless comparatively which honestly seems incredibly unlikely because Bitcoin's innovation wasn't based on technical advancements (obviously other than computers and the internet), but rather it was an innovation of ideas combining several ideas perfectly to create an unstoppable and revolutionary system of money. I really think it is actually unlikely that it is ever topped in execution. The only thing that could compete with Bitcoin would be a similarly decentralized currency (and already explained above how unlikely that is to ever happen) that manages to be extremely efficient on the base layer as well, and given that there has been a huge industry and community trying to do just that and thousands of attempts at that over the past decade and all anyone ever figured out was that if you make a weak centralized cryptocurrency that would be absolutely terrible as money it can handle more transactions, well I don't think that's ever going to happen.