I think those who trade in Bitcoin have less profit but also less risk. If you think it is risky to invest in Bitcoin then I think you are wrong because people have never lost money by investing in Bitcoin, but they have gained a lot. But short term investment can never make much profit, so long term planning is the best and best investment.
On the contrary those who trade on Bitcoin is highly exposed to the risk of losing all there investment and funny enough there chances of being successful and losing everything is actually 50-50 chances, that's why it surprises me to see how most people are so drone to trading that they talk about it all the time as if they can easily be successful while trading. Perhaps that's why whenever i hear most people complaining that investment is very stressful or difficult it use to sound somehow for me because I see no stress on Bitcoin investment if the investors focus on holding because even if the profit is not coming immediately but you will be very relaxed and enjoy your accumulation and holding then profit can come later.
The problem of those that complain is not the stressed as they affirmed but their desire to make it Sharp sharp as they believe that trading is more faster in taking profit compared to investing and holding that it's profit comes late. Just as you have said the risk in trading is very high compare to investing to hold for long term the level of loss one who trade can experience won't be same with one who accumulate and hold.
Though individual choice differs but for me I prefer the investing to hold than trading as it gives me more time to relax than focus on mornitoring the market for trading is not just an easy task as one need give all attention in focusing in the screen and hie the market is going to avoid loss which is not that easy, it involves a whole lots of attention that buying and holding does not.