Why Is Mining So Important?

Cryptocurrency networks need computational power to run securely . The world's most powerful blockchains are supported by millions of computers around the world. Unlike paper money , Bitcoin and other cryptocurrencies are produced mathematically and held digitally . The people who voluntarily offer their computing power to secure these cryptocurrency networks are called miners . Cryptocurrencies don't have a central government or other so - called ' middlemen ' that decide about the future of the system . - They are in fact digital , borderless democracies in which miners vote with their computing power to reach order and consensus .