You likely don't. However most Boomers will be dead within 20 years which is how long I think it will take Bitcoin to become as mainstream as Paypal, twitter, or ebay.
I would like to see your source on the life expectancy of baby boomers. A more realistic figure for the average life expectancy of a baby boomer is 30 years. That also means that a significant portion of the baby boomers will live well past age 80.
As to why a baby boomer should hold Bitcoin. Very simple. Holding a small portion of their retirement savings say even under 1% in Bitcoin can mean the difference between a comfortable retirement and retiring in poverty particularly should the stock market drop significantly.
By the way I am a baby boomer
I am not planning my retirement on the basis of dying in the next 20 years
I do hold Bitcoin
... and by the way I also backed up my wallet.dat among other places on a 5.25in floppy disk. A technology that was obsolete before most of the members of this forum were born!
Well, I got mine on an 8" floppy disc, Sonny. Seriously, there currently are about 65 million of us boomers still around. Imagine only a fraction of them converting 1% of their savings into Bitcoin. The way I figure it, that'll be the ultimate hedge against inflation. Fuck gold! $1,700 worth of gold today, buys you $1,700 worth of stuff. Twenty years from now, if gold is at $5,000/oz, you'll be able to buy...wait for it...$5,000 worth of the exact same stuff.
~Bruno~