You’ll wire transfer the money to this account in the Cayman Islands. “To wire-transfer” money is to send electronically. The Cayman Islands are a small country near Cuba with many off-shore banks.

The stakes are going up. No mistakes.

The “stakes” are the risks and rewards of a situation.

We decided to split up the world between us. :: You have modest wants. I like that in a man.

“To split up” something is to divide it into two or more pieces. Note the use of “wants” as a plural noun! An alternative to desires.