people are spending horded coins.
no one is buying btc to buy shit online.
where do they go when Overstock moves them through Coinbase? Overstock does not hold most of them, so they end up dumped back into the marketplace.
A portion go to speculators, that's well documented. How much is that and how much of that ends up being spent. I know I've spent coins I originally bought through coinbase intending to hold them and then used them when price leveled out for a while.
just applying basic economic principles. If it's a cost savings for people, people will use it, if it isn't they won't.
What I do like about this with Overstock is that they're applying that nudge of some sort of incentive. we'll see if it impacts anything, I suppose.