The mistake that most investors found in this category made is that they don't properly position their minds towards what they are doing, you can't apply the same idea or strategy in dealing with altcoins to bitcoin, that is not possible because is far better and advanced to invest than other cryptocurrencies, now going further on panic, I don't know why there should be panic when we are not new to the system, if the market dips then you hold and when it pumps you sell, there's no need for FOMO because this is what will cause some investors to now go into the actual loss they would have avoided from the first time.
We should not trade in fear, it helps in nothing than to instigate us to lose, because we don't know what to expect and also what may comes in after we have invested, some traders have stand on their ground to the toughest time and ensure that they remained there till it passed and it later turns a profitable one for them, when we are experienced at what we do, we are not going to fall a victim of fear or be intimidated by the market reaction, instead we are going to remain till we turn the table around on our own personal interest and our investment turns a profitable one.
The whole context of your write up is about trading, though if trading works for you then you can stick to it but our discussion in this thread is focus more on how to invest, hodl for a long time despite market sentiments and volatility. That notwithstanding, trading is too risky for one to engage in, and it's time consuming and requires a lot of concentration and efforts and sometimes it can affect your mental health especially when you have encountered too many losses. Those with trading mindsets have nothing to show for and they only get little profits while trading if at all they make profits and it's not even all the time because some days they incur so many losses that affects them emotionally. You talked about being experienced before entering a trade, what is the experience that one can get in trading if not losses and setbacks. No matter how you try to paint trading to be suitable for you, it is not encouraged, and it is a shortcut to poverty because a day will come when you trust a trade so much and entered with a huge amount and you probably lose it which means you will return back to square one and may not have money to continue trading so the best is to make investment, accumulate and hodl for a long period of time and your investment will likely increase with time and you won't stress yourself so much as you do when trading.