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Re:A Prediction: Bitcoin Is Doomed to Fail by jljljl on Thursday November 28, 2013 @05:28PM (#6816799)
Interesting. I did some digging and have a few follow ups:

1) Bid Ask spreads vary by exchange and currency, but it seems that with the exception of BT China an MtGox, the bid ask spreads can be quite wide. Prices for BTC/USD also very a good bit by exchange, meaning the price a merchant sets might be influenced by which exchange they use.

[1] http://bitcoinwatch.com

2) The MtGox live chart seems to imply that an order of a few bitcoins (or a few thousand dollars) could have a profound impact on the actual price of BTC/USD. This does not seem particularly liquid to me, unless I misunderstand the chart.

http://mtgoxlive.com/orders

Re:A Prediction: Bitcoin Is Doomed to Fail by jnbiche on Friday November 29, 2013 @01:28AM (#6818166)
No one is using MtGox anymore, exactly because it isn't very liquid (money hard to get in and out). Take a look at Bitstamp.