These people are giving him treasures, and later they'll have to pay him benefits. Where else in the world can you find such a good deal? They truly are a group of good people.
As for whether Cao Zhen can win?
Is that even a question?
Cao Zhen truly is someone who can combine three types of pills into one, and the pills he has refined before have all been best quality pills. How could such a person lose?
Since Cao Zhen also brought along his disciple, he has absolute confidence.
Besides, he doesn't need to wager treasures; it's Cao Zhen and the others who do. No matter the final outcome, he profits—it's just a matter of profiting more or less.
If Cao Zhen loses, he gains the benefits from others.
If Cao Zhen wins, he earns a bit more, and gets a share of the treasures.
Anyway, he's already in an invincible position.