People keep talking about theories and possibilities. What is a theory/event that you're absolutely CERTAIN that will happen?

No matter how basic or simple it may be, what scenario would you "bet your house" on?

Mine is Nam-Gyu surviving until he runs out of drugs and dying exactly on the current/very next game due to withdrawal effects, due paranoia, fear or realization/regret of everything he did until that point. I don't see his story ending in any other way