If you want to take this step, you must divide your funds into two to three parts. One part is used for long term folding, second part you buy dip, and third part you keep for emergency fund. Because the more bitcoins you receive, the more benefits you will receive.
Of course it should be invested for the long term, you may get more benefits in the short term and face losses later on. But be sure to watch yourself and buy more dips, so that you will be able to reap the maximum benefit when the bull market arrives later.
No one wants to miss an opportunity to buy the dip. This is because buying deep allows you to buy more bitcoins at a lower price, which helps you make more profits during bull markets. But the investment should be long-term. You won't accumulate much bitcoin just by sitting around hoping to buy the dip. You have to deposit bitcoins regularly (ie DCA method). There is no fixed time for buying dips. In this case you can buy dip using your reserve fund.