21 million units of bitcoin have already been issued by the Bitcoin network itself. All the issued bitcoin are released as block rewards equally to anyone who w

21 million units of bitcoin have already been issued by the Bitcoin network itself. All the issued bitcoin are released as block rewards equally to anyone who wants to mine them according to the network rules, and all the miners must use energy to pay for them. No one gets them for free or has power to issue more. Bitcoin is similar to gold in this regard, with the difference that the total amount of gold is practically unlimited and gold is mined with an unpredictable schedule.