kodtycoon made a few statements of regret from selling early if I remember correctly, and that was during the $0.20 USD run NEM had about 1+years before 2017.
I don't get it. Why sell everything? Even though I made insane amount of cash, I left plenty of nem, ETH, BTC (and other crypto) somewhere in cold encrypted wallet, just so that someday, 5, 10, or 20 years from now, I won't regret selling everything. Maybe everything will go to zero in 20 years, but who cares? I would rather still own some even if it's zero than not own anything. I actually do own a lot of dead coins that I never ever sold but they are all dead. Oh well.. so what.