Good strategy but holding altcoins for me is not profitable anymore Because all altcoins already drop on their price to its hard to predict if the will go up or down.
Predicting your future must be depending on what kind of altcoins you're holding right now. If you have invested into only highly reputed coins then you do not need to worry about the current downfall nor the entire cryptomarket's fluctuations. You may simply continue to holding your altcoins. If you are holding some shitcoins then no one could help you. It is time to add up more reputed coins into your portfolio from this dumped market as you can easily predict the bright future for those coins.
emotions greed and panic is always bad for trading we have read many rules in books and we did experience those in real trading but this takes time to improve our emotions
Emotions are always enemies for our trading plans. No books will help you to tackle your emotions while trading but only your experience may help you. That is why pro traders always emphasizing about mock-trading. Through experience we can handle our emotions effectively so that we will not take decisions due to emotional failures.