A high concentration of mining activity in one country threatens the entire system that underpins cryptocurrencies. Vulnerabilities arise when so much mining capacity is concentrated in one place. One of the core security pillars of the blockchain technology upon which cryptocurrencies operate is that transactions are transparent and publicly verifiable. This means that if one actor within the system corrupts a ledger “block,” every peer can see the inconsistency, flag it and correct the mistake on their own corresponding records, maintaining order without the need for a central authority.
In the future, the entire Bitcoin network is estimated to consume up to 185 terawatt-hours each year, almost as much as all global data centers consume annually.

Electricity cost is the most important factor for a profitable mining operation. As mining difficulty increases, the least efficient miners are forced to shut down first.
As mentioned earlier, Bitcoin mining is nothing but the hash verification process to validate the Bitcoin transactions. After validating the transactions, miners provide the essential security for the distributed ledger of the Bitcoin network. The hashes measure the speed of mining Bitcoins per second.