@wedge667The PHS seem to have a
built-in price stabilisation.

The staking profit is very high, so the PHS owners prefer to stake instead of trading PHS on an exchange.

This results in a low trading volume of PHS is quite low.
You can see some "bears" on cryptopia who want to buy PHS for a lower price but the PHS owners prefer to stake PHS instead of selling PHS ;-)
But the time is running against the "bears" because the longer they wait to buy PHS the more stake profit they will miss.