Emotions do play an important role in trading and investing. Fluctuating prices affect psychology and I think if we don't have a good trading and investment plan, we can panic and sell our tokens at low prices.
But if we have a good trading plan and invest for the long term, I think we will get profit as long as we hold the tokens.
Invest in long term can be alternative if we can't control our emotion, i already experience it. Mostly in day trading i can't control my emotion and always cut loss my assets when coin that i bought dumped although a little. With long term investment, i rarely to see market that is why i am not keep to see price of coins that i bought and it made me more calmed.