You need to repress your fear/greed feelings and act with logic. Buy low / sell high.
Any and all valuations of btc in trade for fiat scrip are hideously low by definition.
The people of the future will look back on the selling of btc for fiat currency the way we might would look upon trading a $100 bill for a couple of rare seashells.
Note: Seashells were once used as currency.