I wish I could, I don’t have that much money! ;)
Treasury has lowered the minimum purchase amounts for its’ TreasuryDirect online accounts that anyone can open. The paper savings bonds accumulated can be converted to online ledger accounts even.
Still, there is a huge demographic that doesn’t know anything about computers and probably will never care to learn. Those I-bonds were a pretty good deal (at times) for those who wanted to park a nice chunk of money in a safe spot, and have favorable tax advantages. They aren’t a marketable security though.
A couple of weeks ago I was in rural Appalachia having lunch at a hole-n-the-wall. Sitting next to me were two old coots who were talking about their lawnmowing jobs.
I overheard one quiz the other about why one shrub at a big job wasn't growing. The other rustled himself up enough to say that he would "look it up online when he got home tonight to see if it was a low light or full sunlight shrub."
The moral of this little incident is: when rural Appalachian old-timers have adopted the Internet...***EVERYONE*** is on-line.
So don't go kidding yourself that there are people who aren't online. Maybe at a few nursing homes on invalid beds, but the rest of the U.S. is online now.