Fork (eng. fork - fork, branch): use the code base of a software project as a start for another. Thus, each of the branches may develop independently of the other, in one branch can be implemented features are absent in the other, in this case, both branches may lose compatibility with each other.
Because the source code for Bitcoin is open, then there are forks, each of which is different and is designed to solve the problems of parental cryptocurrency (bitcoin).
In this article you will see several forks of bitcoin BTC, their main differences and characteristics.
If we talk about mining, we need to understand one simple rule: the most profitable strategy are those that are enjoyed by a minority. The more miners miners (miners) - the higher the difficulty, the more quantity of coins and lower the price accordingly. Now the forks pricing largely speculative and only a small percentage of the price is determined by the ideological and technical differences newly minted crypto-coins. So before you throw all your computing power to independently assess and make conclusions. In this competitor world, the minority and the market makers are mostly people who write the client, exchange or other necessary services.