Ha ha ha. That's highly optimistic. It's true that crypto currency has potential to curb corruption but it's not fully evident that it will work 100%. As the adaptation increasing we'll see more use cases and based upon that we'll be able to confirm.
Regarding banks, they are also not going away anytime soon but cryptocurrency surely poses a great threat to that industry. May be in 2 decades picture of financial transactions would be completely different without any central bank.
RE: China Becomes First Country in the World to Test a National Cryptocurrency