Cap Transaction is a time-limited event that consists of a few stages with different Cap collection targets and associated rewards for completing them. Caps cleared in levels will be counted towards your score.
Reaching a stage in the event earns you the stage reward, then you may move on to the next. The more stages you complete, the more rewards you get. Completing all stages for a completion reward. You may obtain more Caps in Hard or Super Hard levels.

How do I participate in Cap Transaction?

To participate in Cap Transaction, you must be at least level 28. You need to beat the level so that the Caps collected are counted. Losing or quitting mid-level will void the Caps collected during that level.