The difference between Bitcoin-pos and POW currency type

The first paragraph: the popular concept analytic POW: Full name proof of Work, work proof. What do you mean by that? That is to say, how much money you get depends on the effective work you're digging for, that is, the better your computer performance, the more mines you'll have to give you, and that's how you perform the distribution of money according to your work certificate. Most virtual currencies, such as Bitcoin, the Wright dollar, and so on, are based on the POW model of the virtual currency (the higher the calculation, the longer the mining time, you will get more money).
POS: Full name proof of Stake, equity certificate. What does that mean? In short, it's a amount and time depending on how you hold the currency, to give you a system of interest, in the equity certificate POS mode, there is a noun called currency age, each currency produces 1 yuan a day, for example, you hold 100 dollars, a total of 30 days, then, at this time your currency age of 3000, this time, If you find a POS block, your currency age will be emptied to 0. Every 365 coins you have been emptied, you will get 0.05-dollar interest on the block (which can be understood as an annual interest rate of 5%), then in this case, interest = 3000 * 5%/365 = 0.41 coins, which is interesting, the holding currency has interest, very good.

The second paragraph: POS design concept and the origin of the design concept of POS, in contrast to the special currency crisis, there are three reasons: first of all, we all know that Bitcoin block production will halve every 4 years, in the near future, as the amount of Bitcoin block contains less and less, the power of mining will continue to decline,   With fewer miners, the entire Bitcoin network is likely to become paralyzed (since everyone has reduced the time to run Bitcoin clients, making it increasingly difficult to find a Peer-to-peer node to connect and synchronize network data).   POS Solution: In the POS system, only open the Wallet client program, you can find the POS block, will receive interest, which prompted many people do not want to dig mines, will often open their own wallet client, which helped the Peer-to-peer monetary network robust. Second, several years later, as the number of miners declines, Bitcoin is likely to be attacked by a number of high power people, or teams, or pools, causing the entire Bitcoin network to crash. 51% attack in simple terms, when you have more than 51% of the world's Bitcoin, you will be able to forge any data in the Bitcoin network, such as you forged you have 1 million bitcoin but in fact you do not.   (Expand reading: What is 51% attack) POS Solution: In the POS system, even if you have 51% of the world's power, you may not be able to carry out 51% attacks, because a part of the currency is not generated by mining, but by interest (interest in the POS block), which requires an attacker to hold more than 51% of the world's money.   This greatly increases the difficulty of the 51% attack. Third, while we know that Bitcoin is a system that will never be inflationary, because the amount of money on the surface looks fixed, do you know that Bitcoin is actually a deflationary system.   Because, when we reload the system, or forget the wallet key, we will never be able to get back the money in our wallet, which means that every year there are some bitcoin that will be locked up with the loss of the wallet, which creates a substantial deflation, and perhaps 50 years later, there will be only 10 million valid Bitcoin.   POS Solution: Provide a certain annual interest rate, as far as possible to ensure neither inflation nor deflation. From the above 3 points we can see that the POS system is a new building on the basis of the POW system, has a very long-term insights and advanced ideas.