Precisely zero other cryptos are accumulating the network effects to become sound money. You can make a critique of Bitcoin development culture without parroting shitcoin promoters. Network effects require every new participant to make the network stronger. In all other cryptos cases every new participant leads to additional centralization, instability, or further perverts their broken incentive structures. 

grayruby

Maybe at L2, as side chain or on lightning, or alternative technology could achieve the same end (e.g. federated chaumian mint)?

bitcoin

Zero Knowledge Proofs: An illustrated primer

The post is from 2014 and ZK proofs will never make it into bitcoin because it doesent have the neccesary development culture to pull it off. The "sound money" lobby is basically in control of BTC and they believe it doesent have to change. Unfortunately for Bitcoin other cryptos have grown up now and are accumulating the neccesary network effects to become "sound money" and they will also be able to pull off the zero knowledge proofs. 