Back during the previous ATH everyone have got similar experience of missing a big opportunity to make money exiting at the right time. Myself has similar experience of losing around $20k worth tokens which on later years turned around $900. By those days I wasn't that aware of the market as well as I never believed on such growth. When sudden growth happened I wasn't able to do anything, and just left to grow further. This is not out of greed, but out of hope. To my expectations things went against my prediction.
A kind of experienced that you will always carry each time you invest your money, it's not something that
will happen a lot of times, if you missed the train the next ride might take longer. You said it's not because of
greed but more on mistakes with your own assessment, many similar cases happen around and there are
investors who can agree with that, it's always good to accept that failure and use it as a learning patterns
for much better business.