Well, the MISTAKE miners are making is they are calculating break-even using current or near-term BTC prices. 5-10-20 years from now, assuming mass acceptance, a BTC might be worth several orders of magnitude more than it is today.
The one making the mistake is you, not the miners.
I think Batshit is correct, and you're wrong, Rannasha. My mining equipment has paid for itself - every BTC I've mined in the last year has paid for it's replacement. My HD5870 paid for my HD6970, which paid for the first HD7950, and the 6970 and 7950 together paid for the second 7950. The three GPUs paid for my 11 Block Erupters. I then sold the GPUs for either what I paid for them, or more than I paid for them, and that paid for my two Blades. They're just about to ROI on the power used since I started mining (helped by my PV array).
During the summer my mining rig will be making BTC and costing absolutely nothing to run, thanks to the solar panels. During the winter the heat from the mining rig is heating two rooms in my house, saving heating oil, and using less than 500W from the wall.
So, I'm pretty happy to continue mining for as long as I can, and will probably invest more of my mined BTC in to new hardware in the future. I'm keeping my eye out for used Jalapenos and Blades all the time...
yes, you are right for old mining equipment bought in the past months, that extensively worked, and made profit, it is fine to keep it still working (now and for the following months).
But if someone plans to buy "
today" a new mining equipment, and he will put it working "
this evening", considering actual difficulty level and that difficulty will go up 30-40% every 10 days, he cannot pay more then 0.03~0.04 bitcoins for 1 GH/s otherwise he will certainly make a very low profit, and over 0.09 bitcoins per GH/s he will lose money. At this point, if he has to spend more then 0.09 bitcoins for 1 Gh/s it is better just "to buy" some bitcoins, and to wait price goes up.
Please consider that if someone put
today 100GH/s to work, mining hardware will produce in 1 month ~ 4.35 bitcoins, and in successive 8 months, ~ 5.58 bitcoins
So, if someone pays today 4.35 bitcoins for the 100 GH/s mining equipment, he will earn 5.58 bitcoins in a total of 9 months. After 9 months, for the next 24 months, 100 GHS will produce not more then a total of 0.10 bitcons
if someone pays today 9.98 bitcoins for the 100 GH/s mining equipment, he will earn 0 bitcoins for the following 9 months
Sincerely I do not understand people that is
actually buying on auction web sites sites, asic mining equipment, paying for 1 gigahas more then 0.10 bitcoins (~14.5 usd).
If someone wins an auction for a
5.5 Gh/s mining equipment and pay more then
79.75 usd (0.55 bitcoins) he is just making a very bad business and who sells him the asic equipment, is mining from buyer's wallet a lot of money
with a very low difficulty rate ).
Probably, in these cases, it is better to buy 0.55 bitcoins, and wait some months for a probable increase in value