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There are new coins that use similar privacy tech but also with a bunch of additional features. For an example zPIV in PIVX. My only problem is why isn't this happening with Buttcoin. Zcash is better than Buttcoin. I still stand by my sub $500 BTC by 2020 - https://steemit.com/cryptocurrency/@vimukthi/you-are-the-elites-financial-newsletter-review-and-how-you-are-secretly-smarter-than-veterans-my-outrageous-prediction-and-why