I think we all believe that, the goal of cryptocurrency is to provide a decentralized and trustless system for conducting transactions and storing value.
Who told you so?
Developers can write anything in Whitepapers but in reality, their projects mostly fail to meet their whitepapers. Whitepapers can be rewritten and Roadmaps can be changed. In cryptocurrency, only Bitcoin is decentralized and safest for transactions as its network is big and cost for attack is so expensive. As a store of value, since 2009 Bitcoin is the best compares to gold, SP500, Nasdaq.
With altcoins, they are not decentralized from founders, developers to coin distributions and networks. Their networks can be reverted and transactions can be censored by their core teams with request from governments.
I don't think altcoin networks are trust enough for our transactions and for storing value.