I do believe we are headed to a downward trend, but people will have plenty of time to sell... I am constantly buying/selling with each swing, making 2-5% each time... This won't be a fast crash down so take your time if you decide to sell 
smart man.
I fully agree, am doing the same. Buy and hold would have earned me around 500% with bitcoin this year, I am around 1000% by simply selling as it goes up and buying as it goes down.
What signals do you use to decide when a trend is about to change?