Price went down, because other "national" coins also dropped: check Maza, Aurora.

The question now is: if this is only a correction or the new trend. Was it only a 2-day hype for national coins or is it someting more permanent? We will see quite soon. In the meantime you can do three things:

a) sell your coins at today price ~ 4000-5000 sat
b) wait and see what happens
c) buy some more PTC if you believe it will be back above 10,000 satoshi soon

There is only ~ 3 BTC of supply up to 10,000 satoshi at cryptorush.in, compare it to yesterday volume of above 100 BTC traded.