Just like wine's taste improves with time. A worthless domain drops; hence an older domain is worth more. The same goes for older women, they have all the juice.
but for some domains, there is no hope.
A worthless domain drops
Strongly disagree.
Do you think a domain like p5.com, UncleSam.com, Jasmine.com etc. are worthless?
Did they drop? Maybe their original owners died, got locked out of their accounts, were engaged in a lawsuit or got drunk for 30 days prior to renewal time.