My Policy is better late then Never.
Why it is not too late because Bitcoin still young and it has long way to run. The previous records of its performance rocket high. So we can expect more from Bitcoin.
Every trading has its own entry and exist limits it all depend upon the financial conditions of the person who will take the decision you should not hold for long time you should book the profit simultaneously.
But what about the saying, "What goes up goes back down?" Bitcoin have skyrocketed but we are still not sure where this will take us. Keep in mind that back then bitcoin also skyrocket up to $1200 and the price slowly went straight down to $200 for months. Now that we had the peak of bitcoin again, will it go back up or will is it going to slowly go down again? As of now, I see no other places where people can play trading better. People think that no one plays foreign exchange anymore but I think that if those people have moved to playing in cryptocurrency, then we should see much better price than this. I don't expect them to come here though because cryptocurrencies aren't backed by anything and aren't issued by any government.