GNU Taler is (for Europeans at least) the most promising system, because it is controllable (at least on the merchant side). The users themself are anonymous, just like when using cash! That is a good system because it enables governments to still being able to tax businesses and control illegal activities. Such system will also gain more acceptance among the common folks. https://taler.net/en/index.html
Outside transparency is not a benefit. Most people I've talked to about crypto don't see the opacity as a detriment. They do not trust the government or tax policy. Most of these people are also generally happy to pay their taxes but can see reasons when they would want to hide their behavior.