Probably not on purpose.
BlockChain is doing that by default now.
and I really doubt anyone is holding $147M on blockchain.
True - didn't think of that.
I wonder where one stores $147M in BTC...
Mhmm... A vault? Lol.
I would use the Armory client and it's offline wallet feature.
You don't need a vault to protect a bitcoin wallet, that's the beauty of it.
People kill other people for thousands.
If someone knew it was on a computer I'm sure there are MANY people that would be willing to kill for $147M and steal the computer.
Offline clients are safer than online, but not safer than paper wallets.
I'd bury a paper wallet if it held that many BTC.
Paper wallets are Plain text Private keys, Offline wallets are usually encrypted wallets which only the owner has the passphrase to and at least one copy somewhere else...