Let's suppose your friend had lost his bet on that day. Would be coming here and asking whether it was a sensible or a foolish move. For sure, you would have said that it was a foolish move and even your friend would have been regretting on his decision. But since he was lucky to win this one, he must be very confident telling everyone that he has accomplished something extraordinary. So you are also confused on this surprise win and asking if this is a good move.
Remember do not fall for these wins as they come rarely. In most cases, people will just lose these insane bets which can ruin their life on the loss. If you want not to be hurt by gambling and betting, it's important to gamble with the risk management plan and avoid these emotional decisions of going "all in" will make you poorer one day.