Q: "Should I buy more ?"
A: "No."
Reason? Is mining dead unless you can be king of the hill in hardware? For $1,000 I could get 35-40 Gh/s. But may take 4-6 months to get...
1) It could be argued America's Favorite Bitcoin ASIC Company does not deserve the support of this community.
2) Do you believe they are going to get through the last twelve months of order backlog in the next 60 days according to their announced intentions ?
3) Does their pattern of behavior over the last thirteen months inspire confidence in their enterprise ?
4) Has their shipping/production schedule since April 1st, 2013 inspired confidence in their enterprise ?
5) Evidence suggests 4-6 months from now, the mining landscape will have second gen ASIC's available for purchase, while America's Favorite Bitcoin ASIC Company will presumably be still struggling to ship out their first gen orders.
6) Mining is quickly becoming a game of diminishing returns.