Hi Nick, If the market's kind to you, you won't need to lower your cash levels. Instead, they may be reduced in percent of total as the Equity side increases in value.
Each of us has to establish a comfort level and then set up our portfolio to mirror it. If we achieve our goals, then we've succeeded. If we set arbitrary goals of some market index increase, then we can set ourselves up for disappointment. That can lead us to extend risk beyond our original comfort levels.
Best regards, Tom