Today,the price of bitcoin raise to $15222.95 from $14000.We can see a steady rise here.I believe that the price of bitcoin will increase a bit till the end of this year of 2017.
I can't guess the price of bitcoin in the coming year.I don't want to take any risk.So,I've decided to sell most of my bitcoins.Not all of them.But most of them.
Wow, brilliant prediction here: "i believe price of bitcoin will in rease a bit", bitcoin's been increasing steadily all year. And i don't think you should sell all your bitcoin, you'll be kicking yourself when the price bounces back stronger after a prolonged stall (which we are due for).
To the OP, selling and spending Bitcoin are two different thngs, they indicate two different attitudes, neither of which is clearly represented in the study you're quoting.
People who say "i'm selling my bitcoin at xxx$ price aren't real bitcoin supporters. People who are only in it for the money are the people that create pump and dump ICOs. If you believe in Bitcoin, you'll never completely sell and you'll never stop buying.