Holding is less stressful than trading but if you have a good knowledge about trading, you will earn consistently but the risk of losing money is also inevitable because even those that are professional in trading still experience losses sometimes too. Some people hold and also trade but that's based on your capabilities. For me, I hold and I also trade.
Of course holding is less stressful compared to trading, although is just a matter of choice because actually there are people at their that is also make money in their trading but the truth still remains the same no two ways about because the chance of losing is always higher than the chance of getting profits from it, so however, I think is just depends on individuals decisions because everybody can not do the same thing at a time, but for me I think holding is more reliable than trading.