Corruption still exists, and even if we think Bitcoin could somehow solve it by moving away from fiat, the truth is that approval still goes through the government. sure, we can use Bitcoin because it’s decentralized and doesn’t need government backing. But the problem is, what if the government suddenly makes it illegal? Even if we enjoy the privacy, we lose the freedom since we’d technically be doing something illegal.
honestly, I think we just have to live with the current state of things. Corruption won’t be fully eliminated, because humans are naturally greedy, and that’s not something technology alone can fix.
If suddenly governments of major powers like the US, EU or BRICS simultaneously ban bitcoin. That could be the end of bitcoin, let alone it becoming popular and widely used.
Even though bitcoin is decentralized, but our world is still centralized and controlled by governments and Bitcoin is just a small part of the world so it won't be able to make any big changes. The emergence of bitcoin only helps us reduce our dependence on governments to some extent, but cannot help us escape from them completely.
As for corruption, we have it too, so don't criticize politicians for being greedy and selfish. Because human nature is greedy, selfish and jealous...and that's human behavior, bitcoin can't solve that problem.