Maybe, but I wish it would be like the Internet pre-2000. That is, it's reserved for mainly nerds our curious people/ early adopters.
I really dislike the modern state of Internet and how bloated it is, and why the heck do I need 16gb of ram just to browse Web pages when they don't do anything more for me than 20 years ago.
Back to the original question, it will grow for sure, but some issues: when I google "lemmy" it brings up the musician in the top posts.
Also (and I don't understand how this platform works yet) won't bandwidth be an issue if many people visit. How does that work? Especially if it starts hosting images. I read that it's funded by donations. I know Wikipedia functions just fine on that model but that's an outlier when you look at the net.
I had the same with mastodon. How they explain it still makes no sense to me, and it seems like some strange echo chamber where youonly discuss 1 topic, whereas twitter is everything, and you just follow what you like.
Turns out I just don't like the twitter format anyway.
Lemmy.world does a good job simulating what Reddit does, but I don't think it will replace Reddit any time soon