I agree if you hold the right coin. Not to be panic is relative hard for newbie. Sometime your experience little bit in different condition, that's why people cannot learn from their experience instantly.
Yes it is always the coins because if you are confident that those coins that you are holding are great coins there is nothing to.worry about even if the price are falling that will always go up again just like bitcoins and ethereum and other altcoins that are successful too. That is the perks of hokding a successful coin even if they are having a downfall they can alway bounce back because they have a lot of supporters. So if you are holding the right one why panic if you knew that it is successful. No matyer hpw likg you are in here that doesn't matter.
Continue your trading and keep going with relevant strategies according to the present conditions of the market. Buy in a low market and hold for long term in order to et maximum profit and you can sell it instantly if the value increases a little but the profit will be of few points.
So hold for a long term in order to get huge profit and do not be panic because the market will soon return and you will get out of the present or current conditions but buy more quantity coins so that you may get its benefit.