I think its better to save the coins till next month and not sell everything at this point. I believe the price will increase even more in the following days considering the current trend in the last few years.
So I think its safe to hold the coins and focus on other stuff.

Bitcoin prices will increase more and more, no worry about that.
Keeping a portion of your coins is always the best decision, because we may get a better price in coming time than this so if we sell all our coins today and tomorrow the price increases then we will surely regret our decision, and also if we keep all the coins and don't sell them ever then the price may drop down and then we will also regret that why we did not sell anything when the price was higher.
I would keep 90% of the coin for the long term. I do not plan to use or sell them for the next 10 to 20 years.
That's a good plan for you mate in the future.. never sell your bitcoins if you really want to invest for long term just hold your bitcoins or invest some portion of it through trading and you'll be fine in the future.
Exactly one should never sell all their coins. Keeping in mind the development of bitcoin and the trends in prices increasing, we can be sure bitcoin to become very popular in the next few decades. People who will hold it long enough with patience and not get panicky are the ones who can make profits, huge profits in the next few decades.
Also selling all your coins will only leave you in a bad situation because then you can transact on any bitcoin store/trade until you buy more.