No one can answer this question for you. If you mainly day trade, does it really matter if the market opens up or down? You can always adjust your chart size and position size based upon where the market is and how it's acting(that's what I do as I only day trade)
If you think or know you won't be able to day trade it properly if it goes way up, than you have to decide if it's worth buying some here or not.... but you said you usually day trade if you bought here long term, that would be more like investing?
Because cash is no different from other asset class. If you have wealth it's always invested even if it's cash. Given explosive growth of USD against everything else in the last month I find it somewhat risky to stay invested in cash 100%