I bought bitcoin when it was around $14,500 in January and I am still holding because I am not discouraged. I have great hope that bitcoin is going to increase in price and volume in some years to come.
So you are in red by more than 50% right now? Don't get disheartened. There is a very good chance that the price will pickup within the next one to two years. The block reward halving can be the next trigger.