IMO, I think there's no such thing as a perfect coin, what I believe is that we have already many good coins and tokens in the market, as you mention above the good characteristic of a perfect coin and tokens.
I can add some, of my rendition about a perfect coin or token it must be a user-friendly blockchain, fast and cheaper transaction fees (it must be set the transaction fee indefinitely in fiat value $) meaning even if the coin or token was gaining price increases the transaction fees must remain the same. in the years to come, and the supply must be fixed so that it will not be inflated and should have a buyback program and burning mechanism. I prepare PoS rather than PoW.