Many people think that some altcoins are better because of the scalability. Please remember that decentralisation is a point that small projects can not realize as there are just a few big whales. Bitcoins decentral structure is far more developed than any competitor. Just take a look at Bitcoin cash, where more than 50% of mining power is in the same mining farm.
Yes, I think there are many altcoins out there that have a better technology than Bitcoin for a long time, Bitcoin is slow and not much change (because each time it takes time to get consensus from the miner ), but Bitcoin is now considered as a storage asset, so its value is always higher than the rest.