Yes, investing always involves a realistic attitude and it is very important to have a clear plan of when to buy and sell your investment. This is especially relevant when compared to emotional decision making based on short term market fluctuations which can lead to bad investment decisions and losses.
That's where many investors have been falling and didn't find any success. And that's because their emotions hard to be controlled and didn't find themselves to be going with the path that they had already planned for.
Fluctuations are within the market and taking profits is essential as this is the reason why we're investing, to make money. We're all optimistic with the tech and stuff but it doesn't end there, we have to take care of our own welfare in terms of going back to the reason why we've started to invest. Being realistic that we're likely to see a 2x-5x of our capitals while some wanting 100x to more than 1000x because they saw some investors got lucky with their meme coins.