Any altcoin that wants to compete with bitcoin has to offer something new, otherwise is just a bitcoin clone...
Altcoins are better than Bitcoin only in the way that they go up more short term speaking, which allows people to use them as leveraged bet to increase their Bitcoin holdings. I have yet to find an altcoin that is actually being used for something other than speculation and gambling related dapps. It's mostly just a shitshow overall. Big promises but none of these promises are being followed up by a working product as originally intended.
Bitcoin has an incredibly strong network effect, the brand awareness behind it, the security, the progress in terms of second layers such as Lightning, etc. Altcoins have already lost the battle in terms of fast and cheap transactions. Lightning keeps growing and keeps enjoying more merchant adoption on a daily basis.
In the end, altcoins don't even have to deliver a product. Them being a speculative object is more than enough for people to buy into them. A lot of shitcoins with zero actual utility are worth hundreds of millions of even billions in some cases. Speculation is their killer "application".