As we mentioned earlier, many new crypto projects and some old and established projects such as Ethereum have now adopted the Proof of Stake algorithm for their networks. The question is why is this so? To answer this question, we will focus your attention on the unique features of PoS-based crypto projects.
• Replacing mining with validation
• Very low entry cost
• Profitability and passive income
• Increased resistance to cyber attacks
• Transaction fees are paid to validators
These 5 unique features have made the use of the Proof of Stake algorithm the top priority of many new and old blockchain networks.

What is Proof of Work?
Proof of Work is a decentralized consensus algorithm in which participants solve difficult mathematical puzzles and, by solving this puzzle and calculating new blocks, mine them.
Many prominent cryptocurrencies use proof of work to validate transactions and mine new coins, allowing them to conduct cryptocurrency transactions without the need for third parties and on a peer-to-peer basis.

How does proof of work work?
Proof of work is an important part of finding new blocks and adding them to the blockchain. New blocks are mined by miners operating in the proof of work ecosystem. Each time a miner or group of miners finds a new block, it is added to the network's blockchain.
Finding new blocks is a laborious process that requires the use of expensive computers and equipment. If the miner succeeds in performing the calculations correctly, a new block is mined and the miner receives their reward. But what calculations do miners perform to mine a block? In this process, miners extract a hash that converts the input into a string of random letters and numbers.
The goal of miners is to create a hash that matches the current purpose of Bitcoin. Miners must create a hash with enough zeros in front of the hash. The probability of getting several zeros in a row is very small, but many miners around the world calculate and create the hash several trillion times per second. Mining each new block on a platform like Bitcoin takes about 10 minutes.
Whoever reaches this goal first receives a certain amount of Bitcoin as a reward. The network then creates a new calculation that miners must hash and compete with each other to find the new block.
Miners in the Proof of Work Process
Miners are participants who compete to produce a new block and submit it to the network. The winning miner is awarded a certain amount of tokens as a reward, both as an incentive for miners to continue working and to ensure that miners are honest in mining new blocks. The reward for mining each block on a platform like Bitcoin is 12.5 Bitcoins plus transaction fees.
To participate in the mining process, miners initially purchase expensive hardware equipment that solves the Bitcoin mining algorithm by solving calculations and continuous efforts, using electrical energy.
Miners receive the reward for mining a block in the form of a native token of the network, for example, Bitcoin, not cash. In fact, miners convert electricity into Bitcoin in the mining process.

Why do cryptocurrency platforms need proof of work?
Cryptocurrency platforms are designed to be decentralized and peer-to-peer, and blockchains, like any other network, need a way to achieve consensus and security. Proof of work is one such method that makes any attempt to cheat the platform impossible.
There are other algorithms that are very different from proof of work and require fewer resources, such as proof of stake and proof of burn. Without a proof of work algorithm, the network and the data stored on it are vulnerable to attack and hacking.
Why is proof of work necessary?
The purpose of using a proof of work algorithm is to prevent the printing of additional coins that the user has not earned or re-spending them. Re-spending is a big problem for platforms and can lead to the network’s currencies becoming worthless.
On most platforms, this problem is easy to solve. In traditional financial systems and banks, this is easy to manage, and if person A transfers 10 thousand tomans to person B, 10 thousand tomans will be immediately deducted from his account.
But in cryptocurrency platforms where there is no such management, the only solution is to use proof-of-work algorithms.
What are the disadvantages of proof-of-work?
Excessive electricity consumption: Bitcoin is one of the most prominent platforms that uses the proof-of-work algorithm. The platform alone consumes as much electricity as the entire energy consumption of Switzerland; of course, part of this energy is provided by renewable energy.
• 51% attacks: If a group of miners can obtain 51% of the Bitcoin mining hash rate, they can temporarily override the network rules, respend coins, and block transactions.
• Centralized mining: Proof-of-work means mining and creating a currency without the supervision of a centralized body. However, according to many experts, the operating system is somewhat centralized, with three major Bitcoin pools controlling approximately 50% of the total computing power of the network.
That's why developers are trying to solve this problem by encouraging users to participate in small mining pools.