I am seriously considering making an investment and buying a 3TH miner. The problem is whether they will still be profitable by the time they arrive...

At today's has rate calculation of 707,408,283 it is expected to return 2.1328 BTC in a 24hr period.

The question is how realistic is this and does anyone own a miner that can confirm whether this profit forcast is achievable?


  • possible duplicate of How much Bitcoin will I mine right now with hardware X?
    – Murch
    Dec 10, 2013 at 14:12
  • @Murch Why downvote Dec 10, 2013 at 14:46
  • I feel that the question is useful only to a limited circle of persons and for a short frame of time. With the changes we see in mining difficulty any answer will literally be outdated next month. This sort of questions don't help to build a time-lasting comprehensive question and answer corpus. It might be a better fit for bitcointalk or /r/bitcoin, where there is a stronger focus on current issues.
    – Murch
    Dec 10, 2013 at 15:04
  • 1
    Underlying, is the issue that there are very many questions on our SE, that are essentially localized variants of questions that have been answered before. These create so much background noise that (to experts) more interesting questions don't stand out: I am motivated to take a harder stance on questions I don't find useful, since I read this Jeff Atwood: Optimizing for Pears not Sand
    – Murch
    Dec 10, 2013 at 15:13
  • 1
    I am not suggesting that the topic isn't interesting, or your question is badly phrased. My point is that I feel that this question is a bad fit to Bitcoin.SE, because you are essentially asking people to predict the future in order to evaluate a product. Predicting the future is primarily opinion based (the SE format is not very good for discussion) and product recommendations are off-topic. Your question is well-phrased, but IMHO just not a good fit for Bitcoin.SE.
    – Murch
    Dec 10, 2013 at 15:36

2 Answers 2


The hard part about pre-ordering next generation hardware is to predict a logical expectation of A) what will be the total network power (hashrate) be by the time your miner comes online which influences directly B) what will be the difficulty value at that time.

If you assume linear growth in the network vs exponential for example you will arrive at different conclusions. That is the real hard part.

At todays difficulty (now 908,350,862) a 2 THps miner at $1000/btc can expect to break-even in 5-6 days.

If looking backwards is any indication, the difficulty has increased by 945% in the past 90 days so if that is the same as the next 90 days and BTC values are fixed at $1000/btc you can expect to break even in 47 days.

IF you think that the next 90 days will grow faster (say 1.5x as fast) as the previous 90 days then you can expect a breakeven in 75 days.

What if your miner comes in 4 months from now instead of 3? What if a whole lot of people are buying one so that when they all come on line simultaneously the difficulty will spike beyond your projections?

And what if the price of BTC falls again from where it is now and stays lower?

A lot of what-ifs but you must know your variables before investing in mining capital.


I thought about it. But the experience with butterfly labs was enough. It looks to risky for me, kncminer are like 12000$ right? you can get 12-13 BTC and with that you can buy immediately 170-185 GH/s on cexio. On Cexio you can buy and sell GH/s for bitcoins so the risk of the investment is not as big as buying hardware, plus you get that GH/s working now not in a few months

  • The problem with that is the amount of Hashing power you recieve for your cash, 170-185 isn't going to generate much income and it will take months to break even on investment... its a difficult one Dec 11, 2013 at 11:45
  • yeah that is true, that price is changing often like yesterday trading went from 0.07 to 0.058 and back. Many people try to get more by trading as there are no commission on trading. Dec 11, 2013 at 15:35

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