Also I read some article that you can mine (generate) the bitcoins from your own laptop, but it just requires so much electricity for running the program to create a unique hash that it surpasses the value of coin you created let alone the time spent for the task. If you have not understood crypto currencies, it is easier to understand if you search for "how to mine cryptocurrencies" than "what is cryptocurrencies". Also interesting is, people can steal your cryptocurrencies, but cannot use them, because of the way transactions occur.