The implications are big: with the current trend of concentrating wealth to only a small fraction of the population, at least all that money is not 'gone'. Even though the rich probably don't pay much taxes over it, their banks will invest it in other companies. If this bitcoin hoarding ever becomes a trend, the consequences for the economy will be disastrous.
These bitcoins were bought with cash, which is now sitting in the sellers "savings" account. The dollars did not disappear in thin air.
What's not clear to me: is this just the keys stored underground and clients have access? or is this "cold storage"?
I'd speculate that more than 7% of the world's gold is locked up in bunkers, where it can be accounted for and borrowed against.
Nobody is shocked to know that gold is stored in vaults. Nobody is shouting that the folks buying overpriced coins from stupid mints are going to decimate the world economy with their irresponsible hoarding.
We're all just totally comfortable that, yeah... in a situation where a-bombs start dropping, gold would probably be a functional store of value.
But they'll want a bunch of a heavy yellow metal? At least the small piece of steel is easier to carry around.
So now we have 0.01% interest 'savings' accounts! They are just as liquid as our checking accounts.