i usually wait till bitcoin price decreas really hard so i can cash out all my bitcoin while its on high state and buy many bitcoins when the price is too low like last year where it hit atleast 500$ and im thankful because i found bitcoin as a profitable way and legal way and also i found that bitcoin price is constantly raising.
So i think it is both waiting the right increase or decrease to exchange your bitcoins into fiat then cashout. The price is impossible to go down at $500 because when i started in bitcoin the price keeps going upward .It will hard to buy at that price maybe we can buy only at below $1200-$1000 .