Imagine you had the money today (you'd already, automatically sold all the stock). How much would you buy?
Once you've figured that out sell everything except the amount you would buy.
It's effectively the same decision, but framing it this way can be helpful. Say your stock is worth 100KUSD. If you had no stock and 100KUSD, would you really spend 100KUSD on the stock? 5K? 10K? That's how I have made these choices in the past.
Also, keep at least one share. The information you get by virtue of being a shareholder is often interesting.
Once you've figured that out sell everything except the amount you would buy.
It's effectively the same decision, but framing it this way can be helpful. Say your stock is worth 100KUSD. If you had no stock and 100KUSD, would you really spend 100KUSD on the stock? 5K? 10K? That's how I have made these choices in the past.
Also, keep at least one share. The information you get by virtue of being a shareholder is often interesting.