I prefer to mix those two. The only holding can make you miss a lot of profit as the market moves up and down, and up and down all the time. Just holding you will see the price growing but you would think it can grow even more and would choose to wait longer. But after that starts continuous correction and you lose that profit and even can get in losses. When the market is healthy and has potential to growth I prefer day trading but during the correction, I prefer to quit to fiat and wait for a cheap price to enter. I am holding if there are solid reasons to consider further growth or if I entered the market but the dump has come and I was late to sell. Then I hold until the price recovers.