Most altcoins have much more interesting tech and value proposition than bitcoin, but all are dependent on bitcoin because it is the main trading pair, but bitcoin is very limited and has trouble scaling or offering anything besides currency (that is not private and not fungible keep that in mind) - also becoming quite centralized thanks to asics, that also have mostly one producer - there have been talks about Bitmain compromising their asics with backdoors see www.antbleed.com and keep track of the buyers. Not very crypto. Feel like there are two waves in crypto the private blockchain/government approved/law compliant blockchain tech and then the "peoples decentralized" stuff and likely the second one will not be as popular, but is what original idea of crypto was and bitcoin doesn't fall into that category …..