My choice is Bitcoin Private:
1) The best privacy technology zk-snarks, which by 2020 plans to improve in zk-starks.
2) There was no premise, there is no commission of the block for mining. Resources for development - collected in donation fund, therefore the developers are responsible for every dollar and always report on the work done.
3) Low transaction cost (For a typical transaction of $ 175, we would pay about 2% + for processing credit card payments depending on the type of card, which is equivalent to $ 3.50 + per transaction for this amount, compared to $0.06 which will be paid by the person who sends Bitcoin Private).
4) Blocks are 2mb every 2.5 minutes, which is plenty enough to fulfil requirements from users. (I by the way do not understand why BCH increased its block size, which they now cannot fill)
5) Duplicate zk-snarks and Bitcoin blocking, and this is Segwit + Lightning Network, this is support for multi-hardware and other wallets, parallel development of two technology vectors.
6) Progressive marketing team and company. Listening to the community. I was very surprised to see so many people who believe in this technology and the team, 11 thousand chat participants in the telegram, more than 1000 active Ambassadors worldwide and growing Daily; with Ambassador Contests to help promote a friendly and encouraging atmosphere! BTCP also have Community Lead and Driven Teams helping BTCP in their own ways.
7) Decentralization. No masternodes, everyone has the right to vote and to be heard
https://t.me/bitcoinprivatenews
https://t.me/BTCPrivate
https://btcprivate.org/
https://twitter.com/bitcoinprivate
https://reddit.com/r/bitcoinprivate
http://discord.gg/9DyxXnx
Exchange: HitBTCAnonymous cryptocurrency charts (05.13.2018)BTCP
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