I can not look into the future - unfortunately, otherwise I would already be rich haha but I have already read and learned a lot in recent months. Of course you also need a lucky hand. So it's hard to say what will be the next big thing, but gamechangers certainly exist.
I really like methods that stand out from Bitcoin and co. and think they are really interesting. So no more proof of work, but proof of personhood like Idena for example. There's a democratic approach and everyone gets the same amount, if you know what I mean. I think in a world like we find today, that's a good approach. :-)
Of course, it's hard to say how the whole thing will develop, but you don't have to invest a huge sum right away, but you can do some “tests” with smaller amounts of money as well.

I also find NFTs quite exciting and am curious to see how it develops in the future. It goes up and down sometimes... you never know what will happen. But in the meantime there is more and more talk about it. Metaverse will also play a role. I would like to get to know more about NFTs and Metaverse before I invest into it.