One of the most important way of fighting this emotions is only when the investment is done with the money from our discretionary income meaning that you are not depending on your investment to solve your personal needs so even when the market is in downturn you will have nothing to worry about with the confident that it will bounce back and more higher over the long term unless maybe you are a short term trader looking for a Short term profit that you will get disappointed and panic during the market downturn because the only thing you are thinking of is to see Bitcoin going up forgetting that the market conprises of the ups and the downs .
A good investor will not have to rely on his or her investment to salvage personal needs, why would one even think of such, I think every investment has a procedure, infact I don't think that it is even ideal for anyone to even think of withdrawing from there existing investment to solve problems irrespective of the particular investment that's involved, this is more reason why investors are advised to invest with what there pucket can accommodate to avoid shivering when the market flops, Bitcoin investment remains what it is, it has not change, anyone coming into the investment must understand that he or she is in for long-term stuff and nothing more.
Traders are known for those attributes you mentioned that's why they are regarded as quick profit chasera and for that they are not real Bitcoin investors per say because they aren't ready to Hodl for a long-term, they are always in a haste for profit that might be unrealistic at the end.