How much computing power will be needed to mine 1 bitcoin per day or even half of it?
A good question was answered by William Douglas on Quora. Here it comes below.

To mine one whole bitcoin per day

Or even 1/2 of one per day….

In Bitcoin mining, there are at least 7–8 exahashes per second of computing power executing and growing continuously

That is :

7,000–8,000 petahashes

7 billion – 8 billion GH/second

The s9 ant miner cost about $7,000. And gets 14 TH/s or 14,000 gh/s

If we assume bitcoin mining consumes 7 billion GH per second (it is most likely 8, 7 just makes calculates into prettier numbers)

And each antminer offers 14 thousand GH per second

Or .0002% of the mining (.000002 x 100%)

And there are 2,000 bitcoin a day:

83.33_ every hour

1.388_ every minute

.02315 every second

You would get .004 BTC a day

For 7,000$

You would need 250 S9 antminers

For only 1 btc a day

250 x 7,000 = 1.75 million dollars

Or 875,000$ for half a bitcoin a day, based on hashing

You could still get more or less than the given amounts because it all comes down to chance with hashing.

You could also probably buy equipment that is more efficient with that type of money, the S9 antminer is just the most efficient consumer available mining hardware.

I don’t really like bitcoin all that much, this ridiculous computing is the biggest reason, you could power cities across the world with this energy…. And it’s used for bitcoin instead, the least efficient of all the cryptocurrencies in terms of scalability and transaction speed….

I hope I helped!
Sincerely, William Douglass