Theirs nothing you can do for now if the price is decreasing since psb is little undervalued at this point and if you can't take to see that your money is melting then sell it so that you your losses will not be huge if some certain bad scenario will occur unto it. But if you believe that this coin will comeback alive  then just stake it and wait for miracoulous slap from heaven but seriously men its your decision on what you are going to do with your PSB right now.