If the rich are more likely to get a block, they are more likely to collect the reward for the block. Every block they get, the richer they become. The richer t

If the rich are more likely to get a block, they are more likely to collect the reward for the block. Every block they get, the richer they become. The richer they become, the more likely they are to collect the reward for a block. https://cointelegraph.com/news/the-inevitable-failure-of-proof-of-stake-blockchains-and-why-a-new-algorithm-is-needed https://cointelegraph.com/news/the-inevitable-failure-of-pro... The author works out the math and it doesn't look that bad, especially compared to some proof-of-work centralization scenarios: If that is the case, this user should control 50% of the stake in about 1,015 years and 90% of the stake in 1,275 years. In reality, it is probably less because not everyone stakes but that gives a rough idea about how long NXT can potentially last.