The title tells the message: Please hold with updating to iOS4 before Money 4.0.8 is available.

Many users have noticed that Money 4.0.7 is not compatible with iOS4. We have submitted Money 4.0.8, which is compatible, but it is still not available on the App Store! Please wait till then before updating your iPhone OS. Money 4.0.8 should become available as soon as possible because we have taken all the measures to speed up the release process.