My initial plan was to invest in differents altcoins... I think it is a good example of emotional trade

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Do you think it's a better idea to go out now or in few days when there will be a little pump OR to hold Bitcoin cash for a long period and forget my invest in others altcoins for the moment ?
Everything can give you an advantage in the future. If you hold it for the long-term you will only get 1 big advantage, but if you invest in many altcoin the profits will be doubled.
So I think the better is to invest in a lot of altcoin.