The question is how much is your initial capital? I think 1% is too low, though this is solely depends on you. On the other side taking your inital capital after 3x gain is good but for me I will also get some profit from my gains so if the price turn downward I already enjoy some of my earnings. Well this is also depends on your strategy since we have our own way of thinking.

If the altcoin that you hold is well-established and unlikely to be delisted in exchanges (and turn shitcoin) then there's no reason to sell completely. Just choose a worthy altcoins because even there's a negative news circulating that can affect the price, it wont turn to zero and will certainly bounce back again.