1. I always like the idea of " not selling everything ", assuming I have 1000 tokens I always sell 90% even when they are at ATH, leaving very few coins and tokens behind do have it's time, there will come a time where they add more value, remember not every ATH is the last ATH.
Yes I agree with you. I always set aside 10% of the tokens I have when I feel it is appropriate to sell them. Because I also hold a belief like you, that the current ATH is not necessarily the last ATH and it is proven that almost all the tokens that I still hold touch the new ATH.