<div dir="ltr">I've been trying to do an estimate of what I might expect to make if I bought a bitcoin miner from Butterfly Labs, and I thought I'd share my calculations in case any of you found it interesting (and to double check my math... LOL)<div>
<br></div><div style>Ok, So according to <a href="http://www.bitcoinwatch.com/">http://www.bitcoinwatch.com/</a></div>The network's current power is 82.77 TeraHashes/Second (I'm making the assumption that there are zero butterfly labs machines out there at this point, which may not be entirely correct)<div style>
<br></div><div style>The network is automatically adjusted to target the creation of 7200 bitcoins per day (though it varies both up and down, this is the average that the math attempts to maintain).</div><div style><br></div>
<div style>So, you currently need to do 41.385 TeraHashes to create a bitcoin, on average. This makes sense since 7200 is about twice the number of seconds in a day... So far, I think my math is about right.</div><div style>
<br></div>So the vapor hardware 50 GH/s Bitcoin Miner at $2,499 (that's right, not yet available) would create a bitcoin, on average every 827 seconds, or every 13.7 minutes. (Of course, they are really created 50 at a time...)<div>
<br></div><div>So now the interesting question is what happens when there are thousands of these machines actually out there... What happens is the difficulty goes up. Some of the serial numbers on ebay suggest that they have presold as many as 53,000 of the 50 GH/s Miners, though that is a guess based merely on serial numbers beginning with 1 and going up by 1, which is probably a reasonable guess. So that gives 50 GH/s * 53000, which ups the network capacity by 2650 THashes/second, meaning that the entire network will be 1587 TH/Sec, making the difficulty roughly 31 times more difficult (and making all the old bitmining hardware pretty worthless). And that is just the big boxes, doesn't count all their smaller units, and those of their competitors... Is my math messed up here?<br>
<div style><br></div><div style>So if the guy on Ebay is right that one of the 60GH/s machines will make $336/day (I didn't check his math). Then once these are out there, you could expect to make about $10 a day off an investment of $2500, which is a return of $3650 on an investment of $2500 if nothing better comes out during the year... for a profit of $1150 minus the cost of electricity. That seems like a lot of risk.</div>
<div style><br></div><div style>I found another article where the guy said he thought the difficulty was rising about 5% per week. If a bunch of these new machines ship quickly, that will be a fond memory of the past, for a little while anyway.</div>
<div style><br></div><div style>Another interesting article on how the bitcoin network compares to supercomputers.</div><div style><a href="http://www.kurzweilai.net/bitcoin-network-speed-8-times-faster-than-top-500-supercomputers-combined">http://www.kurzweilai.net/bitcoin-network-speed-8-times-faster-than-top-500-supercomputers-combined</a><br>
</div></div><div style><br></div><div style>So, I can only assume that it is going to get worse, as this chart seems to show. </div><div style><a href="http://bitcoindifficulty.com/">http://bitcoindifficulty.com/</a><br></div>
<div style><br></div><div style>Bottom line... If you can get an ASICS machine in the VERY short term, it's probably not too horrible... but if you get one in six months, it will take a long time to earn a return, if you ever do. But damn, that's some number crunching for the ages folks!</div>
<div style><br></div><div style>-Kelly</div><div style><br></div></div>