Strengths and weakness of PoW vs PoS 

The main strength of proof of work is security; bitcoin has never been successfully hacked in the past 17 years it has existed.   

The more people that join, the more secure the network gets.  

An attack would be so costly it would be considered economically irrational on bitcoin’s network. One would need to control more than 50% of total computing power on the network.  

Another strength is anyone being able to participate with the right hardware. 

Hundreds of thousands of random people all over the world contribute computing power to the network, and while mining has become increasingly industrialized, no single entity controls the majority of the networks total hash rate, which is the threshold at which one could theoretically manipulate the blockchain.   

This represents what a decentralized system looks like, with no central authority controlling the protocol and no single point of failure. While governments can exert influence over it, no single government or corporation would be able to shut it down completely. To put this into perspective, the U.S. government, for example, owns approximately 329,000 bitcoins, more than any other government or entity on earth, and that is still only around 1.6% of total bitcoin supply.   

However, the amount of energy used is too detrimental to ignore.  

Imagine a room of thousands of computers on max power 24/7, racing to solve the same puzzle, just for one to win. Every other computer just burned through energy for nothing which could have gone to something more useful, and we can never truly put a price on the lost opportunity cost.   

Proof of stake is far less energy intensive, along with it being faster and more efficient.  There is no need for millions of computers to go full blast every second. Instead, you have a group of validators who approve transactions in an instant with barely any energy. Most platforms optimizing for speed use proof of stake. Ethereum can handle thousands of apps and financial services daily because more developers build on it more than any other network.   

While convenient, it also carries a disadvantage. If someone accumulated enough crypto to control 51% of the network, they could theoretically approve fraudulent transactions and manipulate the system.  

The other disadvantage of proof of stake is that it naturally favors the wealthy.  

The more crypto at stake gives you a higher chance of being validator and receiving rewards. Therefore, theoretically, the rich keep on getting richer.  

On top of that, joining a staking pool comes with its own risks. You are handing over crypto over to a third party. If that third party gets hacked or the funds are mismanaged, you could potentially lose everything you put in. 

Conclusion 

Each consensus mechanism has its own strengths and weaknesses. Despite the flaws, proof of work and proof of stake have proven themselves to be sustainable ways to keep a crypto network functioning. The crypto world is still very young and has endless amounts of potential. It is also possible that future innovations can strengthen the weaknesses of both, but for now, knowing the differences between the two are the first steps that you should know if you want a better understanding of how crypto works.

We also have a video for your viewing pleasure: https://youtu.be/L60CWMq2jRc