My favorite sector of the crypto markets is non-utility coins that aim to be the next bitcoin, and pretty much none of them have gotten close (except for bcash at it's peak). Maybe BTC will work out, i'll admit I hold a little just in case it does, but I don't have that much faith in BTC devs working on the lightning network because of the numerous problems that could potentially occur with the LN and other reasons that i'm not going to talk about.
I think the best contender to this date right now is Bitcoin Private; after a lot of research into this projects' team and the tech they propose, I can now say with confidence that BTCP is going to be one to watch very closely. This is not financial advice. Do your own research.
It does everything that we originally thought BTC was going to be. When you first heard about BTC you assumed it was fully anonymous. Eventually we all realized it's semi-anonymous and could be a lot better. We thought BTC would always be fast and fee's would be low. We thought mining rigs wouldn't be mostly chinese farms. We thought it was very decentralized and we thought it was immutable. We we're wrong and we have to admit it. I love bitcoin and always will, but I also loved my grandpa before he died, some things you just have to let go. Satoshi was brilliant but he and like all other brilliant minds, aren't perfect. Einstein made mistakes too. We need to take what Satoshi gave us and we improve it to what he wanted it to truly be but was unable to completely accomplish. Bitcoin Private isn't just private, it fixes much more problems with BTC than privacy, and that includes being more decentralized due to equihash and a miner governance system.