~snip~
You can't be that naive. Of course, it's possible to place that large bets but depends on sports, league, market, etc.
And most definitely it's possible to know 100% the result of the match, fixed games are played more than you think.
I'm not being naive. Even a fixed game can end up with a surprising result.
Even if you have internal classified information, a deal can go wrong, etc.
There's simply no 100% guaranteed result in life.
True. Even in games where the odds are 1.1 or less for the favorites sometimes the outcome still goes on the other way. There really is no telling on these fixed games or even in games that has very low odds, except for the latter wherein the other team has serious issues like injuries or the likes. But if it's a fixed match between two healthy competitors, I wouldn't risk it even if the source claims to be 'credible'.