Though this post is very old and he is not active now.I am replying because of his posts.
The bes time of selling your altcoins is the end of every year . Always in this part of the year altcoin rich ther maximum .
Your answer is wrong mate.Best time to selling atlcoin end of the year? Why? best time sell altcoins if you are in profit and you dont want to take a risk.Also if you bought shit coins or scam coin then try to exit as soon as possible.
entering the end of the year is a crucial time for all altcoin movements, so it is possible for prices at that time to start to improve and deserve to sell. but we know a lot of bad altcoins that did not develop after ico, for that now to avoid buying such altcoin. because it's clearly not profitable later.