Actually investing in Bitcoin is far better than trading because there is no guarantee of making good profits from trading, the chance of losing is always bigger than the chance of getting profits from it. But when you invest in Bitcoin and hold for future purposes is most surely yield good profits at last, because the most important thing when it comes to Bitcoin investment is just time and patience.
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.