For this we recommend: Kraken — The largest European exchange with same-day SEPA Local Bitcoins — This fantastic service allows you to search for people in your community willing to sell bitcoins to you directly. The source code for MultiMiner is structured in such a way that makes it easy to use and re-use for other projects. Hashnest Review : Hashnest is operated by Bitmain, the producer of the Antminer line of Bitcoin miners. Once you have this setup and are mining, you may need to cash out some of your coins in order to pay off your expenses such as electricity. Can be used to mine in a pool or solo.