Bitcoin yield formula
1. Machine cost: the cost of purchasing mining machine
2. Power cost: the power cost consumed by machine mining
3. Auxiliary costs: personnel maintenance, network, cable consumables, heat dissipation, etc.
for a simple example, take the mining machine of ant S9, which consumes less power on the market, for example, the calculation power is 13.5T, and the power consumption is 1400W
when the mining machine runs for 24 hours: 1.4kw * 24 = 33.6 degrees
Shenma m3, which consumes more power on the market, has a calculation power of 11.5t, The power consumption is 2150w
under 24-hour operation, the power consumption of a single machine is 2.15kw * 24 = 51.6oc
which is roughly equivalent to the power consumption of energy-saving air conditioning, but the bitcoin miner needs 24-hour uninterrupted operation, the power consumption of a single machine is very large after a year's calculation, and the step price cost of household electricity is too high, When the market is not good, the income may not be enough for the electricity expenditure, so at present, mining will choose to be hosted in the mine, which can get cheap electricity and rece the cost price of mining. The price below 30% is the ideal price, which can keep the price of bitcoin falling to a low level, and there is still some income< According to the current mining difficulty of bitcoin:
BTC revenue per ton: 1th / s * 24h = 0.00007087btc
calculated by the comprehensive 12t machine computing power, the daily output is:
0.00007087t * 12t = 0.00085044btc
then the time required for a single machine to dig a BTC:
1 / 0.00085044 = 1175 days
the time required for ten mining machines to dig a BTC:
1 / 0.0085044 = 117 days
100 days In other words, according to the current difficulty, it takes about three years for a single miner to proce a bitcoin, 3.9 months for ten miners to dig a bitcoin, and 11.7 days for a hundred miners to dig a bitcoin. The cost of a single miner is about 8500, Ten are around 85000, one hundred is 850000, less than one million, and one month's income is more than two bitcoins. According to the current price of bitcoin, the price is about 120000. So, although the income of bitcoin mining is not as good as before, it is still considerable compared with other investment projects
however, these benefits do not include decting the cost of electricity charges and later maintenance of machines, so the premise of mining is to find a mine with low electricity charges. If the quantity is large, we need to find a safe, reliable and stable mine. What's more, we need cheap electricity to lower the cost price.
Formula: investment profit rate = annual average total profit / total investment × 100% (annual average total profit = annual average proct income - annual average total cost - annual average sales tax and surcharges)
the application index of return on investment, according to the different analysis purposes, the return on investment can be divided into:
1, total return on investment (ROI)
ROI calculation formula: ROI = EBIT / Ti * 100%
2, net return on capital (ROE)
The calculation formula of roe: roe = NP / EC * 100% 
extended data
the rate of return on investment reflects the earning power of investment. When the ratio is significantly lower than the company's return on net assets, it indicates that its foreign investment is a failure, and the structure and projects of foreign investment should be improved; When the ratio is much higher than the return on net assets of general enterprises, there is a suspicion of profit manipulation, and the rationality of each income should be further analyzed
The advantages of investment return rate are: the economic significance of the index is clear and intuitive, and the calculation is simple. To a certain extent, it reflects the advantages and disadvantages of the investment effect, and can be applied to all kinds of investment scale. The disadvantages are: the time value of funds is not considered, and the importance of time value of funds is ignored; The index calculation is too subjective and arbitraryin other words, it is difficult to choose the normal proction year, and there are some uncertainties and human factors in how to determine it; It can not correctly reflect the impact of the construction period, different investment methods and the amount of recovery on the project, the comparability of numerator and denominator calculation caliber is poor, and the net cash flow information can not be directly used
reference: Network - return on investment
Investment profit rate = annual profit before interest and tax or annual profit before interest and tax / total project investment * 100% (profit before interest and tax = sales revenue variable cost fixed cost = net profit / (1-income tax rate) + interest expense = net profit + income tax expense + interest expense = total profit + Interest expense)
function significance
investment return rate reflects investment profitability. When the ratio is significantly lower than the company's return on net assets, it indicates that its foreign investment is a failure, and the structure and projects of foreign investment should be improved; When the ratio is much higher than the return on net assets of general enterprises, there is a suspicion of profit manipulation, and the rationality of each income should be further analyzed
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extended data
profit before interest and tax
1, profit margin
operating profit before interest and tax = (net profit + income tax + financial expenses) / operating income
2, change rate
change rate of profit before interest and tax = change rate of earnings per share of common stock ÷ Financial leverage ratio
profit rate before interest and tax = operating leverage ratio × Sales volume change rate