A small number of large mining pools, or more small miners, which one is safer?
My point of view.
According to game theory, vested interests will strive to maintain the security of the network, whether it is a mining pool or a small miner, so the security of the two is equivalent.
From a practical point of view, if someone wants to maliciously damage the network, attacking the mining pool may be easier than attacking more scattered miners.
In addition, decentralization is more fair to miners, but the operation and maintenance costs of miners may be slightly higher than mine pools.
Scattering may be more conducive to scenes with higher fairness requirements such as random number, election, etc.
The probability of fork in 2POW is smaller than that of traditional POW. This is because the difficulty of each node is different, and the probability of generating a block at almost the same time will be relatively small.
More small mines forming 51% attacks will be more difficult than large mine pools.
Once the 51% attack condition is formed, to successfully launch a selfish mining attack, 2POW is also more difficult than traditional POW.