If the price of Bitcoin is always going up, investors will never be able to participate in investment, because when the price of Bitcoin is low and a dip is created, investors immediately start buying.
That's why there are various strategies for investment and sometimes when the price is high and you want to wait till there is a dip you just wasting time because there are strategies you adopt that you don't have to waste time waiting and still help reduce the impact of market volatility. With Bitcoin if you invest periodically (DCA) you don't have to worry about whether the price is high or low, in years to come you will still be at profit that's why long term investment is mostly advised.
Therefore, when there is a dip and instability in Bitcoin, the fear of investors to invest increases,
You're getting it all wrong, when there is a dip it is the best time to get Bitcoin at a cheaper price and instead of panicking about it you should see it as an opportunity to accumulate more to get the best out of it. It's normal for new investors to get scared but with time they will know that it's just part of the game.