My portfolio is pretty much at an all time high. Would it be dumb to sell everything, sit, and buy into the next dip?

My portfolio is pretty much at an all time high. Would it be dumb to sell everything, sit, and buy into the next dip?

My portfolio is pretty much at an all time high. Would it be dumb to sell everything, sit, and buy into the next dip?

My portfolio is pretty much at an all time high. Would it be dumb to sell everything, sit, and buy into the next dip?