Quote from: graphicsdump on January 13, 2014, 01:12:29 AM

Quote from: Jobe7 on January 12, 2014, 02:31:52 PM

I was about to purchase a KNC neptune until I ran over the math.

https://www.kncminer.com/products/neptune-second-batch

If there not shipping till May - June why would anyone purchase these when the difficulty of bit coin will rise so high?

When it would arrive you would only make 2 Bitcoins in your first month.. Less the one in the second then half again the next? With the price at over 12$k with VAT wouldn't you be losing a a lot of cash?

http://bitcoinwisdom.com/bitcoin/calculator

5-1 5-31 (136 days)    15042 M    2.094    2.052    25.14
6-1 6-30 (166 days)    33047 M    0.9941    0.9743    26.11
7-1 7-31 (197 days)    55850 M    0.4926    0.4827    26.6
8-1 8-31 (228 days)    122 G    0.1973    0.1933    26.79
9-1 9-30 (258 days)    207 G    0.05148    0.05045    26.84

Am I getting something wrong or have people over looked these facts?

It makes sense to mine for the next three months, but after that, it doesn't make sense to mine with any amount of hashing speed because in May / June things fall off fast...from looking at the calculators at least. Are these calculators based on solo mining? Pool mining? Am I looking at this wrong?

Some people expected the difficulty to go up 40% a month, some expected it to go up 100% a month. So, different person have a different expected revenue....