It is depends on our approach to the market motion. It is better to sell or hold in the right timing because once we did mistakes then it is our lose at the end. Better depends not on the emotion rather by the flow of the market price.
I think their Is no losses to be done, when you need money on that time, so thats the main purpose here to earn money. And If you have enough funds, then thats the time to do hold your altcoin or token.