Why is it that people are said to pay top dollar for expensive things but when confronted with a huge wager bet their bottom dollar?
There is no acceptable answer to this quandary so I think it's time we all came to a compromise - the middle dollar. It's graced with half the topness of the top dollar as well as a like amount of the bottomness of the bottom dollar. It's versatile enough to be used in all reasonable circumstances and is the most cliche-worthy phrase since "The vampires are playing baseball."
So that's established. Middle dollar, people. Go out and start saying it. Middle dollar.*
*This does not apply to people who have only two dollars.