Well... either way, it is very irresponsible to gamble with that amount of money. You would have been better off just depositing that amount of money into a Bank and just buying bitcoins with your interest and gambling with that. Sites like Freebitco.in give 4%+ interest per year that are paid out daily ... and some Banks or investment options can give you more.
So, if he deposited the proceeds of the 400 bitcoins into one of these options.. he would have received almost $250 000 interest p/a and about $25 000 per month to gamble with, without touching his 400 bitcoins. (People might say that is risky too, but I would rather gamble with the other people's (Bank) money than my own.)
Thats why its called gambling and not investing.
Why do you think there is place called vegas, well because people like to gamble. They like to dream to win big money and its for entertainment.
Investing is a different topic and not even remotely comparable to Gambling.
So, if he deposited the proceeds of the 400 bitcoins into one of these options.. he would have received almost $250 000 interest p/a and about $25 000 per month to gamble with, without touching his 400 bitcoins. (People might say that is risky too, but I would rather gamble with the other people's (Bank) money than my own.) Wink
At that point it wouldnt be the Banks money, it would still be your money youre gambling...