Privacy is a constant battle between those who wish to increase it and those who would strip it away. Never is this war more apparent than in Bitcoin, where factions with opposing ideals find themselves at loggerheads. On the one side are the blockchain surveillance companies that work hand-in-glove with the three-letter agencies, regulators, and governments. And on the other side are the cryptographers and developers seeking to introduce protocols that will bolster Bitcoin’s privacy.
https://news.bitcoin.com/3-technical-proposals-for-increasing-bitcoins-privacy/