Majority of these digital currencies are either trying to solve problems of a particular cryptocurrency by presenting solutions they think can help improve financial freedom.
You got it wrong.
99% of altcoins are get rich fast scheme, nothing more. "ideas" and "innovations" they propose are pure nonsense targeted to people that have no idea how this technology actually works and that its just empty words
Crypto was needed long time ago, but noone could create decentralized without central authority, Bitcoin did that, that is revolution. Since Bitcoin in 2009 there is no such project that achieved actual revolution.