I follow Hold and sell strategy to make at least some profit rather than selling at Nil profit or Loss.  I do Keep 40% of coins with me and the other 60% sells gradually based on the price changes of Altcoin I trade in. and then with the other 50%, I do set some target percentage of profit, once the coin reaches to half of the target price, I do sell at least 10% of coins and I wait for the target percentage and sell the 10-15% of coins from the total amount of coins.i use this method for trading.and keep eyes on the official tweeters for holding coin, you can get better idea sell or hold