BitCoin just got very serious and much less fun. I guess that's what happens when it suddenly accounts for real, actual money and real actual livelihoods. I sincerely hope everyone gets through safely.
I use CoinBase which (seems like it) is slightly more reputable.
Edit: Madoff was much more. Still, this would be significant.
12,437,700 bitcoins have been mined, with a market cap today of around $7.4B [1]. Madoff scammed investors to the tune of around $50B [2], so even if MtGox owned every bitcoin ever mined, they would have a bit of catching up to do.
[2] http://www.forbes.com/2008/12/12/madoff-ponzi-hedge-pf-ii-in...
Apparently about $36 billion was paid in, and $18 billion paid out, and about $10 billion recovered, leaving about $8 billion(!) "missing". All the numbers are still bigger than both BTC and Gox, though.
Although, didn't the US literally lose something like $10 billion in cash in Iraq/Afghanistan?
Why? There is basically no discernible benefit to keeping your money in an exchange, but there are huge risks associated.
1) Does CoinBase have an interest in keeping my BitCoin's safe? They do.
2) Is it competent to keep my BitCoins safe? They seem about 100% more competent than Mt. Gox, which isn't saying much, but unlike Gox I actually believe CoinBase has had its cold storage audited, especially by its rather well-known backers who almost certainly do not want to lose prestige to a massive BitCoin heist/loss...
3) If I keep my BitCoins on my home machine will they will be a) harder to access from anywhere I wish to access them and b) equally susceptible to being lost?
Yes, and yes.
I've seen too many nightmares of people losing their private keys to believe that I'm fundmentally more capable at keeping my BitCoins safe than CoinBase is.
The worst thing about this is that you are probably recommending this scheme to everyone else.
The promise of BitCoin is that it functions like cash, with all the advantages of electronic payments. If I can't bring my cash with me everywhere, then yes, it does fundamentally limit its utility to me.
BitCoin is just like any other money: the base system is based on distrust but for it to be mainstream an ecosystem of trust must be built around it. If we can't sort out the difference between competent BitCoin institutions and incompetent ones then we are in a world of trouble.
Speaking of ecosystem, I noticed that FDIC insurance suspiciously missing.
Theoretically a 'good' Bitcoin exchange would have insurance and multi-factor auth, and some complicated internal crypto scheme to minimize the scope of breaches. I can't imagine any of the current exchanges are that advanced yet.
Any half-decent online wallet or exchange keeps the vast majority (typically ~95%) of their funds in "cold storage", usually with an n-of-m encryption scheme, which will minimize the scope of breaches, with an occasional inconvenience when withdrawals exceed projections before they can pull funds from cold storage.
Even given the malleability bug (which actually isn't the real problem: http://blog.tlrobinson.net/bitcoin-transaction-malleability-...) if Mt Gox managed to lose more than say 10% of customer funds they were doing something seriously wrong.
Cold storage is an interesting concept for an exchange, but it still seems fundamentally inferior to normal banking's procedures for undoing fraudulent transactions. N-of-m encryption schemes are nice, but they only really make sense if you have each of the keys in a different hardware crypto device. Even then, in practice I suspect all of the exchanges are set up such that 95% of their cold storage is accessible via machines that are connected to the public Internet. (I'd be interested in independent audits that show otherwise.)
Wasn't there a Reddit thread about how Coinbase is using Mongo as a transaction backend?
... The natural corollary to the Kim Stanley Robinson-ian "That's libertarians for you -- anarchists who call the police to get their Bitcoins back."
I hope they get through safely, if they had the foresight to hire a private security firm to protect them?
Playing Devil's advocate, if the Mafia took control of your city, and forced you to pay 20% of everything you made (or be taken from your home and family), but offered to "take care" of any other criminals that might bother you, would it be hypocritical of you to not want to get robbed twice, and therefore use the services that you already had been forced to pay for?
When you live in a system that is forced upon you, it's not hypocritical to use the benefits of that system, since you're forced to withstand its drawbacks.
There are worse pseudo wallets, like dice sites and mining pools, but it is still a bad idea.
"Coinbase is an international digital wallet that allows you to securely buy, use, and accept bitcoin currency"
It really comes down to whether you trust Coinbase (equivalent of a bank, albeit a startup bank) or yourself (equivalent of putting cash in your mattress) to securely store your money.
You can even trust a regular bank, by putting the key in their safe. And if it's encrypted, you don't even need to trust them to not abuse it.
And using something like ssss[1], you could also store it in a lot of places at once, without any single one having enough info to use your coins.
The point is it's your responsibility to secure it, and if you think you can do that properly then great. I can do it, but I don't think it's easy enough that most "normal" people can do it properly yet.
Bitcoin offers a lot of security mechanism that are not available with traditional asserts, like m-of-n-keys etc. Insured online wallets will become available as well.
I've had friends lose Bitcoins both stored themselves and in exchanges/online wallets.
In any case you should think carefully about your choice.
With many Bitcoin users claiming Bitcoin is not money, I don't see the fraud here.