But instead you successfully bought it at low , the price continue dropping and you start frustating.
You can do cut loss when you think it won't be a good situation for you , but keep holding itself there's no harm as it is part of the taking risk.
But if you are trading with altcoin there is no guarantee or assurance that you can hold your altcoin for a long time and buy more cheap price to make profit in the future..
The development of altcoin is slow than bitcoin if we compare them..
So it will be depends if what coin we are holding or we want to buy..