This your last paragraph talks more of someone who doesn't like trading but checking your last sentence shows that you like trading. Well in the game of crypto currency every body left with their personal choices. It might be that most people make profit In trading but trading doesn't gives you the time to do other things. Your focus is only on uptrend and downtrend. to use the opportunity of the down trend 📉 to make profit in the up trend📈. but the disadvantages of trading over holding is that in trading is that:
 
The mindset of a trader.
1. Trading makes you nervous and panic when you loose.
2. Causes mental and psychological unrest. Every 247 always concentrated and doesn't need distractions.
3 prevent you from doing other important things except if you make out time. Because most traders I know of so t have time all what they think is to only focus on their market, because you cant have such fund their and expect to leave it their.
4 a traders mindset make h/her feel that holding bitcoin for long is a waste of time. because the up and down movement would have been used to make profit, rather leaving it there to waste. So when you are a frequent trader you can never think of holding.

Mindset of a holder over a trader
1. You are not nervous because you don border about anything wether it falls or rise. But keep accumulating and hoping for a better tomorrow.
2. There is no mental psychology unrest. Because your mind is set at zero(0) degree. No need to put all your mind on it anymore.
3. It doesn't prevent you from doing other things. Because you accumulate and hold and feel free, you can go anywhere without monetizing anything.
4. You don't have that mindset that holding is a waste of time and effort. But rather strive to make sure you accumulate knowing truely that the future has a great potential with Bitcoin HODL

So checking the two, you will discover that a holder has more advantage and  health benefits over a trader. For me I prefer HODL for long.