Of course we have to be patient to do any work. Likewise, we have to be patient by investing in bitcoin. Because Bitcoin is a digital coin, it is sometimes up and down. So you can invest long term in hopes of more profits. That's why we all have to be patient for more profit.
Most of the people lack's patience every time the market price is dropping and that is the reason they lose a huge amount of their investment due to the volatility of the market.
That is correct, for we are here to make some money then why are we selling in low market for little profit or may be if you are an investor in 7k figure and now you proceed as panic selling then you will face with loss because the current price is rolling in 6k dollar. We should treat it as long term investment and not short term and remember that those who are making it short term will not see anything positive.
Different people have different mentality. Some people think that the price is expected to fell down more therefore it is better sell in current price and get the chance buy it again in comparatively low price. But some time when the sell their bitcoin they cannot get another chance to buy bitcoin in low price. Which cause some lost to them.