many individual miners are probably in their 20s or lower 30s at that oldest
Don't kid yourself.
I've mined for years and I'm 66 years old.
As soon as I need to put the heat back on, I'll be firing up the ASICs again.
Wow maybe you are already dead when btc takes of.
Kiddin..
LOL That's what I told the chick down at Decentral when I bought a couple more coins yesterday.
Hopefully I'll never have to sell any of my coins (just spend what I must) and my nieces and nephews will inherit them all.
I certainly don't expect to be starving on my old age pension when I'm in my 80s and 90s.
I want to be able to hire and fire my own caregivers if I need them.