For sure, there is risk in holding altcoins. But this risk worths holding the coins. It's needed in other word, and if you get profit, the risk of holding would be the supporter of your profit.
Risk is taken for great chance of profit at the end of story.
We all dont want to have risk for our capital but if you dont take it then just stay in comfort zone where we get certain income but not enough to make us rich
I really do not trust the altcoins, the cost of them is dependent on the billionaire investor. They will control the cost of all the altcoins and it will cost us a loss if we do not have enough patience and knowledge.