Although, no investors is happy when his investment is declining instead of appreciating but a good investor that have good understanding of the volatility nature of Bitcoin will not be under pressure when Bitcoin is in dip because the rate at which Bitcoin appreciate is much more than the the decline.
In as much as you can understand Bitcoin volatility and decentralized nature then you need not to be scared of anything and therefore you will make use of every slightest chances to make something good out of it. So if that is at the back of every investors mind they'll definitely know when they are having profits and losses and with that they will see it as parts of growth instead of panicking when they undergo some level of decline in their trade or investment.