Jordan Tuwiner Last updated June 30, The early days of Bitcoin mining are often described as a gold rush.
Scenario 1: Big Chinese Miners
Those with a strong interest in such things, namely cypherpunks, cryptographers, technically-minded libertarians and assorted hackers, were first to stake their claim. But is there still gold in them thar hills? Bitcoin mining has grown from a handful of early enthusiasts into a cottage industry, into a specialized industrial-level venture. The easy money was scooped out a long time ago and what remains is buried under the cryptographic equivalent of tons of hard rock.
The sad truth is: Only those with specialised, high-powered machinery are able to profitably extract bitcoins nowadays. While mining is still technically possible for anyone, those with underpowered setups will find more money is spent on electricity than is generated through mining.
Proof of Work Hashing: This is the cryptographic work which miners perform in order to find the solution which allows them to define a new block. PoW hashing ensures the proper function of the Bitcoin blockchain. There are no shortcuts in this process, which can only be solved with raw computational power. By correctly hashing the current block, miners prove their investment of work and are rewarded with a certain number of newly-created bitcoins.
The number of newly-created bitcoins, awarded to whichever miner creates a block.
Calculating Mining Profitability
This number was initially set to 50, halved to 25 in late, and halved again to The next halving event expected is around mid The higher their relative power, the more solutions and hence, block rewards a miner is likely to find. With hashrate shooting up over the years, it would seem blocks would be found by miners ever more rapidly.
It adjusts to hashrate to ensure that blocks are found roughly every 10 minutes. Note how closely Difficulty matches Hashrate in the 2 charts above.
When total hashrate rises, the Difficulty of POW hashing adjusts upwards — and the inverse also applies. Difficulty auto-adjusts every two weeks or blocks. The current fiat price of Bitcoin ; critical for calculating profitability.