The worst situation is when you've held the coin for several days, and as soon as you sell, it starts to surge. I originally planned to hold long-term, but my mindset fluctuated and I acted, only to see it keep climbing. That feeling is like carrying a sedan chair for someone else. I always reflect on whether I should trust my plan and hold or be more flexible in adjusting my strategy. The mindset during holding positions is indeed the biggest test in trading cryptocurrencies.