I think Pivx is just being pumped right now, but there will always be a correction to its value and that has not happened yet, once it does you can expect its value to decrease dramatically once dumps start to happen :)

Dash on the other hand has had its correction and is at todays price $69 dollars and is expected to pass its all time high of $130 again mid / later this year. Keep an eye out, not only that there are advancing the crypto world, have a look at https://www.dash.org/ and https://www.dash.org/evolution/