Tokens can also insulate against blockchain problems, so one can still trade even while rogue miners have driven a chain's difficulty way up then abandoned it so it will take months or more for whatever few miners are left to it to get the blockchain moving again.

The Galactic Milieu uses tokens for many classic ancient blockchain coins, see https://MakeMoney.Knotwork.com/horizon/assets/ and https://MakeMoney.Knotwork.com/stellar/