If you have a short-term target then in such volatile period, I would recommend trading in short as well as the long way in order to earn the profit in rising as well as falling market environment. I do a lot of trading, but sometimes it seems as though it would be just as good to buy and hold
but for now, I think it is too risky to still do trading because every altcoin is got down and we don't have a good chance to make a profit without waiting for the price increase back. but maybe we can buy another amount in bitcoin or altcoin because every coin is down so we can buy at the lower price while we still have a chance to wait for the price increase so we can sell it later. I think in this situation, it is better to still hold our coin until the price gets to increase again.