It will be interesting to see what happens when Ethereum switches to POS though, because Coinbase's Eth holdings are just as dizzying as their Bitcoin holdings. Perhaps that people will be incentivized to take care of starage themselves.
do you think they would stake with customer deposits? that seems unlikely from a PR standpoint, right? the optics are obvious horrible with sites like yobit because they literally block withdrawals for weeks while staking. it seems pretty sleazy even if customer deposits are always available, but is it unacceptable behavior? i assume cold storage staking will be possible in ethereum.
the POS transition will be a big incentive for people to withdraw ETH to their own wallets. it'll probably pump the price a good deal.