put one's money on

to bet money on something, typically in the context of a game, event, or outcome

I would put my money on her winning the competition, she’s been training hard.
He put his money on the new business venture, believing it would succeed.
If I had to put my money on a team, I’d choose the defending champions.
She put her money on the startup, expecting it to thrive in the market.
He’s going to put his money on the project, convinced it will yield good results.

Synonyms:

*** to feel very sure that something is true or that somebody will succeed