Mining is the process of adding transaction records to Bitcoin's public ledger of past transactions. This ledger of past transactions is called the block chain as it is a chain of blocks. The block chain serves to confirm transactions to the rest of the network as having taken place. Bitcoin nodes use the block chain to distinguish legitimate Bitcoin transactions from attempts to re-spend coins that have already been spent elsewhere. Mining is intentionally designed to be resource-intensive and difficult so that the number of blocks found each day by miners remains steady. Individual blocks must contain a proof of work to be considered valid. This proof of work is verified by other Bitcoin nodes each time they receive a block. Bitcoin uses the hashcash proof-of-work function.
The primary purpose of mining is to allow Bitcoin nodes to reach a secure, tamper-resistant consensus. Mining is also the mechanism used to introduce Bitcoins into the system: Miners are paid any transaction fees as well as a "subsidy" of newly created coins. This both serves the purpose of disseminating new coins in a decentralized manner as well as motivating people to provide security for the system. Bitcoin mining is so called because it resembles the mining of other commodities: it requires exertion and it slowly makes new currency available at a rate that resembles the rate at which commodities like gold are mined from the ground.
What is Bitcoin Cloud Mining?
Cloud mining or cloud hashing enables users to purchase mining capacity that of hardware in data centres. Two operators, Hashflare and Genesis Mining, have been offering contracts for several years. Bitcoin cloud mining enables people to earn Bitcoins without bitcoin mining hardware, bitcoin mining software, electricity, bandwidth or other offline issues. Bitcoin cloud mining, sometimes called cloud hashing, enables users to buy the output of Bitcoin mining power from Bitcoin mining hardware placed in remote data centres. Then all Bitcoin mining is done remotely in the cloud. This enables the owners to not deal with any of the hassles usually encountered when mining bitcoins such as electricity, hosting issues, heat, installation or upkeep trouble.
What are Bitcoin Cloud Mining Advantages?
- No excess heat to deal with
- Quiet because of no constantly humming fans
- No electricity costs
- No bitcoin mining equipment to sell when bitcoin mining is no longer profitable
- No ventilation problems with hot equipment
- No preordered bitcoin mining hardware that may not be delivered on time by bitcoin mining equipment suppliers
What are Bitcoin Cloud Mining Disadvantages?
- Unverifiable or otherwise shady Bitcoin cloud mining operations
- No fun! If you like building your own Bitcoin hashing systems.
- Lower profits – Bitcoin cloud mining services or operators have expenses
- Bitcoin mining contracts may have the ability to cease operations or payouts in the contracts if the Bitcoin price is too low
- Lack of possession of the Bitcoin mining hardware
- Lack of ability to change the Bitcoin mining software
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