I know its an individual thing, but if you are in an alt and it is pumping...when is the best time to sell? I feel as though every-time I am in a coin that starts to make some good gain I leave it to long to sell..Anyone else do that. I heard it is because of greed, we star imagining all things we can do with our new profits, but the longer we leave it the more chance of not making good profits. Does anyone have a good strategy for knowing when to sell?
You actually answered your own question: it depends upon the individual.
Generally, there are certain indicators in the market that will tell you when is the time to acquire/sell your coins. Same in stocks, you must be updated both in the intrinsic and extrinsic factors that will help you arrive at a decision. In addition, you must also determine what price you should stop HODLing your coins in order to prevent further loss.
There is no absolute solution and indicator for this. Everything will depend upon your own decision and goal from the very beginning.