You are absolutely correct the best way to go about Bitcoin is to buy and hold for a long period of time but because of impatient and the quest to get rich quick make people indulge themselves into trading and gambling Bitcoin which is very risky and not advisable for someone with little fund or one who's new. I disagree with this your statement " Bitcoin is not a tradable coin to make profit", when you say something is not tradable it means that particular thing can not be trade right? But we all know that there are people who are trading Bitcoin as we speak so that means you are wrong about that..., Perhaps you should said that Bitcoin is not worth to be traded though some people make profit in trading Bitcoin but everything has principle on how to go about it of which trading Bitcoin is little or not part of the principle of how to go about..., that is why the possibility of making loss is very big and the earlier we know this the better for us.
Most people in the world have lost from gambling and a small number of people have gained from gambling. But my comment is that their wealth is not enjoyable. Because gambling is illegal at every level and no one can live happily with illegal wealth.
Am very much shocked and surprised by this particular statement here, it's very much true that in gambling only few people wins, but am very much curious to know when gambling became illegal?
Secondly, you said that the money made from gambling is not enjoyable, how bro? Have you gamble before? Have you taste a winning before?
Though I don't encourage gambling due to addiction and it's a personal thing but who told you that most gamblers aren't living happily? The earlier you understand that happiness is a choice and gambling isn't illegal the better.
Then going back to the topic of discussion which is Bitcoin, actually it's the real deal, and for you to invest in it and be successful, you must have a source of income and an emergency fund so as you wouldn't have to temper with your Bitcoin investment when you are in pressing financial needs.