We kinda have the same phenomenon where in we can't sell as what you mentioned on 2017 that you were still schooling.
I am still in the middle of learning on how should I sell my Bitcoins back then. Either way it isn't something to be regretted of since that event repeated already and it gave us more than what we were expecting to happen again.
ATH in 2017 is memorable but now we got another ATH price to be passed down to newer people to come in cryptospace especially Bitcoin.