despite the fact that POW stays reliable algorithm, there’s a danger for bitcoin to be centralized so far, yes, the rich keep getting richer and I can’t see the solution of main trouble – initial coin distribution…
Agree. While PoW can provide a greater level of security than most consensus algorithms we know and love today, it's wasteful in energy consumption, and it's extremely centralized (in the case of Bitcoin) when specific mining hardware is designed for it. The advent of ASICs allowed Bitcoin to be extremely secure, but the biggest downside is that it prevents small miners from participating on the network, and gives the power to those who're wealthy. Here, Bitmain has the most dominance in the Bitcoin network. At any moment, the company could decide to perform a successful 51% attack to destroy Bitcoin.
Which is why, I believe that Bitcoin's current mining algorithm is centralized and could turn out to become even worse, as mining monopolies like Bitmain keep releasing more advanced miners for their own benefit. Unless, other mining manufacturers emerge with the capability to compete with Bitmain, the latter will retain that dominance over the Bitcoin network for many years to come.
If Bitcoin wants to become as decentralized as possible, I believe that it should look out for mining algorithms which penalize big miners and mining pools on the network. This would allow small miners or everyday people to participate on the network, minimizing the risk of centralization. One good example is the M7M PoW algorithm used by Magi (XMG) which reduces its block reward the greater the hashrate on the network. As such, it would encourage everyone on the network to use the minimum amount of hashrate possible, allowing anyone to participate on the mining process. This approach is far more decentralized than Bitcoin's current PoW algorithm, IMO.
Nevertheless, only time will tell if Bitcoin would maintain a decentralized network, or all the way around it. Just my thoughts