Should we hold on to altcoins which we have invested and see the price dropping every moment or it will be better to sell them and buy it again when the value pumps ? I have already lost a good margin of profit with the ripple I don't want to make the same mistake with the Lumens which I Hold so should I hold on or sell out ?
Nobody can know when the value pumps, otherwise we would all be millionaires.
It is all about market trends' feeling: if you feel the bear market will continue, then yes, you could sell and buy back later as altcoins lose much more from their value compared with btc. If you feel the market will recover, then you might want to hold them as good projects can have a higher price recovery during bullish periods than btc.