Well, sometimes, it can be very hard for people who haven't invested in anything either in real estate, gold or any other things in the stock market to have the mind to buy the dip because such person might be thinking that it will continue to dip but not knowing that it is given he/she more chances to buy and hold. What I mean is that if a person hasn't been involved in any investment before, it can be a little hard for the person to invest in Bitcoin because of scepticism, but if the person has been involved in investments before, then the person will have no need to be skeptical, but all that he/she needs is just to have the mindset of risk and patience to hold and accumulate.
Buying Bitcoin and still expecting profits in a short time has higher risk than buying and holding for a long term. Let's take. For example, an investor buys Bitcoin at the dip and plans to go sell away in just a month and it still gets a dipper (what a chance to buy more). Bitcoin tries to give so many people a chance to buy and hold, but based on their impatience and indiscipline, they don't settle down to think or even take advantage of the dip, but if an investor buys at the dip and plans to hold for a year or more years, even if Bitcoin gets dipper it's giving the investor more chances to buy more and hold.
Wherever you invest there is bound to be risk and whether the risk is big or small will be proportional to the possible profit you will get, it is quite worth it.
People who buy Bitcoin and expect big profits in a short time are greedy people, not only in Bitcoin but in any investment, greedy people will never make a profit in the end of the story.
For people who don't have extensive knowledge about Bitcoin, of course they will have doubts about keeping it for a long period of time, but that is inversely proportional to people who have known about Bitcoin for a long time, I think there is no strong reason for them not to dare to hold back for a long period of time, as past history has proven.