I think its up to each of us to determine when we have a "full position" and then take a more hands off monitoring position.
I acknowledge my concern with some participants who take the view that this is their "highway to the stars" and put all their resources in the "single basket".
One constant in stock market involvement is the advice "diversify". The range of that diversification is again up to the individual but not only does it provide some degree of moderation it also heightens the interest as there are other stock issues to follow.
Onward and Upward.