Sell some and if it goes higher sell more?

My guess is on this unamed marketplace you needed a certain about of USD.  The BTC are now worth more than that USD value.  As an example lets say you need $500 and the BTC is now worth $800.  You could sell $500 worth of BTC as a hedge, then let the remaining BTC ride.  If they go up significantly more you could sell another $250 worth and let the rest ride.