Proof of Work VS Proof of Stake

Proof of work solved two main problems which are provided simple
algorithm that allows network nodes to vote or verify some updates of
the bitcoin ledger and allowed a free entry to this process to solve the
problem of who gets to influence the consensus with preventing attacks.
Proof of work succeed in that by substituting a formal barrier to
participation, such as each single node power in the verifying process
is depending on the computing power that the node brings. After that,
problem of huge power and electricity fees began to appear in order to
continue working with the proof of work which led to a new alternative
approach called proof of stake that is calculating the weight of a node
according to its currency staking or holding only which means more power
and electricity saving. The discussion showing the benefits of the two
approaches proof of work and proof of stake and both approaches can be
used for any cryptocurrency.