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Not replace, they dont have to be in competition. They may just be for different folks. Dash is aimimg to be the crypto your grandmother could use... not so sure about that with pivx though. Like omar said, pivx if you solely want to make money, has some potential. Game changing? Maybe not so much.. good place to make profit though for sure with all this buzz. It was at 20 cents sunday and at 75 cents now..