Sell some and party. 
Even if it goes to a new ATH I won't sell all, there's always a chance for it to go higher and even at $500 I'll have enough to call it the best investment of my life.
In other words you caught a falling knife.
Even if it goes to a new ATH I won't sell all, there's always a chance for it to go higher and even at $500 I'll have enough to call it the best investment of my life.
I started slowly buying at around $700 and having been buying more on the way down.
In other words you caught a falling knife.