I guess we will see everything fall and bitcoin rise 
I dont think it will drop below 400 in the next 8 months.
It is not smart to sell everything at once because the value of the Bitcoin can always go up again, that means that you still can make more money. I dont think it will drop below 400 in the next 8 months.But if you have just sold them all then it is not possible, you should always save some instead.
But bearex was right, Bitcoin was only rising from the time he posted. And I think he wasn't suggesting selling everything because if one thinks BTC will rise in the near future it's illogical to suggest selling all of your coins now.