Once miners have verified 1 MB (megabyte) worth of bitcoin transactions, recognized as a "block," those miners are qualified to be awarded with a portion of bitcoin (more about the bitcoin reward below as well). The 1 MB limit was arrayed by Satoshi Nakamoto, and is a signified of controversy, as some miners felt the block size should be increased to sustain more data, which would definitely mean that the bitcoin network could process and verify transactions more expeditiously. ( Check Out Nicehash For Bitcoin Mining Using Your PC )
Note that verifying 1 MB worth of transactions requires a coin miner eligible to earn bitcoin—not everyone who verifies transactions will become paid out.
1MB of transactions can theoretically be as insignificant as one transaction (even though this is not at all common) or several thousand. It depends on how much data the transactions take up.
"So after all that production of verifying transactions, I might nevertheless not receive any bitcoin for it?"
Answer: That is correct.
To earn bitcoins, you require to satisfy two conditions. One is a signified of effort; one is a matter of luck.
1) You have to verify ~1MB worth of transactions. This is the obvious part.
2) You have to be the first miner to appear at the correct answer, or closest answer, to a numeric problem. This process is likewise perceived as proof of work.
"What do you mean, 'the right answer to a numeric problem'?"
The positive news: No advanced calculus or computation is involved. You may have discovered that miners are solving complex mathematical problems—that's not precisely true. What they're actually accomplishing is demanding to be the first miner to come up with a 64-digit hexadecimal number (a "hash") that is less than or equal to the target hash. It's basically guesswork.
It's guesswork, but with the total number of possible guesses for each of these problems being on the order of trillions, it's incredibly arduous work. In order to solve a problem first, miners need a lot of computing power. To mine successfully, you need to have a high "hash rate," which is measured in terms of megahashes per second (MH/s), gigahashes per second (GH/s), and terahashes per second (TH/s).
That is a great many hashes.
If you want to estimate how much bitcoin you could mine with your mining rig's hash rate, the site Cryptocompare offers a helpful calculator.
NiceHash is frequently more profitable than mining a single coin because you are mining all possible coins for an algorthim with NiceHash. Even a multipool like Zpool or MiningPoolHub will ordinarily be less profitable than NiceHash because it is absurd that they will offer all of the most profitable coins. Likewise, a group of multipools don't have a significant enough hashrate to find blocks for the most valuable coins.
With NiceHash, you again don't have to deal with orphans, chain splits, exchange rate slips, exchange issues, and more. If you mine personally, there's a surprisingly good chance that your coins will go down in value between the time you mine them and the time you get them to an exchange (it's anywhere from 2 - 12 hours).