My best estimate of a desirable target date for the issuers (assuming SEC does not seek to delay it unreasonably) is November 8th, 2014, which is the 10th anniversary of the issuance of GLD. I do not have expert data required to form a mechanism-based timing estimate.
I doubt the SEC cares much about anniversaries. The paperwork has been in since June or July 2013. ETF approval sometimes takes two, three or more years. The fund's lawyer says it's best not to rush it.
I would not be surprised if it did not happen in 2014.
While COIN is the best, because it is NASDAQ, you can be assured that if it tarries, a London, Frankfurt, Singapore, and/or Hong Kong listing will occur before 2016. Any of those would suffice to drain a lesser ocean.
Good.