The only reason we say holding is better than trading is because if the risks involved, trading has so much risk involved that got people scared and that is why every investor who wants to grow will always prioritize the one that has less risk, which is holding to the one that is more risky. If you haven't been into trading before and you want to start, it is adviceable be careful in order to chose the right part because it is always very confusing the path to follow, whether you will hold or you will trade. If you are looking for immediate gains, trading is the best answer, but the risks involved is another thing to consider, and if you are looking for a future profit, you will go for holding because it is the one that needs patience, and also less risky.
There's no guarantee that a person going into trading will make a quick gain either. The person may go after quick profit and end up with losses, he may start out as a gainer in trading and end up as a loser because trading is the real gambling and gambling has never been an investment. A long-term investment will save the stress and help the investor to avoid wasting all their strength watching the price and losing money at the end.
What is good about holding is that it saves you in future, and it is the reason lost of investors fancy going into it. Therefore for every beginner going into trading, it is adviceable to follow the one that won't stress you emotionally and mentally, somei that will give you assurance,, not something risky. So holding should be you preferred choice.
Just so that you don't get so high hope of the long term holding of bitcoin, it is important to remember that even though investment is way better than trading and more trusted in the long term, it is not also guaranteed that holding bitcoin for a long-term will bring profit. But the point is that, you could perhaps, never lose your capital at the end. This justifies why it is also important to only invest in bitcoin using the amount of money you can afford to lose at all time.
If a beginner or any investor invests what he can afford to lose, he can ongoingly accumulate bitcoin without stress and perhaps hold for a long term.