For new investors it definitely requires balls of steel in some situations, especially during corrections, but if you aren't doing anything with your funds, there is basically no need to stress out over Bitcoin's fluctuations.
If you have let's say $100,000 in your savings account, and you don't plan to touch any of these funds for at least a couple of years, why would it sting you that the value is fluctuating? The same applies to Bitcoin as well. Bitcoin's bias is always to go up in the long term, and as long as that's your target, you're all fine. Fiat's bias is to always go down in the long term, so I am much much more comfortable to hold through Bitcoin than anything else.
I remember how trolls back in 2014 during the correction made fun of those that bought the 2013 peak of $1100. Look where we are today. As long as you keep holding everything there is no need to stress. It only took ~4 years to book a 500% returns (I'm conveniently ignoring the near $20,000 peak). Where do you get these returns? Patience.
Biggest problem for people who maybe want to invest in BTC is ignorance, they just do not see full potential of this technology and there is still a widespread opinion that BTC will one day collapse to 0. So most of people who have extra money invest in gold, silver, stocks or real estate same as big investors these days, and if they decide to enter with their money in crypto market perhaps ordinary people would change their minds also.
It is also important to people know when to buy/invest in BTC, not in time when price is going up in some crazy speed - but in times like it is right now. In few years we will probably read how Tim Draper is buy xxxx BTC when price was 6000$ and value of his coins is not in million $, but in billions.