Depending how much you spend right in your retired years.
I'd probably want 50 btc if not more lol. Cause more never hurts, if anything it just makes you able to do more things.
Yeah and we should be also prepared with worst scenario we might face if the value is low in future so its always best thing to hold maximum number of coins.
Well said if we are in the best side no matter what happens, with the increased price we can have a good life, but its really important to consider the worst scenario and get prepared to meet it. I believe we can be prepared but such situation won't happen.