I think decentralized mixing is on the horizon and may become baked into bitcoin wallets down the line. I'm speculating based on the emergence of protocols like

I think decentralized mixing is on the horizon and may become baked into bitcoin wallets down the line. I'm speculating based on the emergence of protocols like FairExchange and Xim http://forensics.umass.edu/pubs/bissias.wpes.2014.pdf http://forensics.umass.edu/pubs/bissias.wpes.2014.pdf