At the time, did you (not) expect bitcoin to succeed in becoming a payment method, displacing paypal and credit cards, or did you (not) expect bitcoin to become "digital gold", of little use except for being something that most of the time more people want to buy than sell? If it was the former, there is very little to beat yourself up about.
Kind of my point: I never heard of a bitcoin early adopter who started out saying "sucks for payment, but I'll happily bet on it becoming a self-sustaining rally", but many who initially expected a currency seem to have unknowingly pivoted to the nice feeling of owning ever increasing virtual riches (that will only grow bigger and bigger as long as almost everybody sticks to the program of not touching that wealth, "just one more turn"), with no payment function at all.
I didn't.