The days will come, but how many days will it take - or rather the years for the financial system to become decentralized? I'm not a pessimist by nature, but the system is very firmly rooted and hard to change - at least I haven't heard any serious politicians or bankers talk about it yet.
For a financial system to become decentralized, it will be a dream as the politicians will not like that to happen, do you really think that they really want a transparent system, not in a light years and you will not hear any politicians or banker talking about having a transparent decentralized system.
The problem with all the exchanges monitoring the coins is that if the coins are coming through mixers then they might mark those coins and they might even confiscate the coins asking for the source.