Army teaches patience, discipline and giving life for the country. I don't understand how an army man can become addicted to gambling. Anyway to my knowledge I have never seen anyone get rich from gambling. Gambling is an addiction. When he is repeatedly losing gambling, he should have quit gambling.
Army man cannot do anything without the permission of government and one who is a part of army will not do anything that will harm him and is bad for his family and country. Other thing is he is a disciplined person he will not do gambling but sometimes a person is so greedy in order to earn more money that he cannot wait for his salaries and put his money into gambling in order to enhance money but he loss his own salary too.
You are correct. If he was not a gambler and had invested in bitcoin, he could have easily paid off the debt and made a good financial profit.
Investment in Bitcoin and gambling is very different things and we should make a differentiation between them. bitcoin investment is a popular and successful way of earning whereas gambling is just lossing of money, lossing of trust and lossing of everything so remember that always choose a successful way instead of that way in which you loss your own respect.