I think the best way to approach this is get the concept of fiat currency out of your mind. Think as if bitcoin is the only currency there is. Don't try and convert prices back to USD to compare how much you made. If you have more bitcoins than what you started out with, you have made profit. In the short term this might not seem like a good enough solution. But if you believe in bitcoin and the price speculations of bitcoin for the next few years, then yes, definitely, if you have more bitcoins you have made good profit in the long term