It depends to the will of the investors, in my opinion holding and trading are almost the same. Because if you trade you need to buy different coins and if the coin you choose is not consistently growing, you have no choice because you need to hold it. But when coin you choose is easily raising up it means you can easily sell it so the tendency is to buy again and wait to reach your target amount to sell.

However, for me it's better to trade than to hold, because if you hold your crypto currencies you just need to wait a lot of time before sell it again. While if you trade it and you can't satisfy with the price you have an option to buy another or other crypto then sell it in your target prices. It means you can easily earn income if you do this thing.