There is actually no single individual we can identified as controlling bitcoin since it started. And so far the founder created a holistic economy with bitcoin without any interferences and as such no banks or any other could interfere with it and have control over it. The can only stop their operations in nations and nevertheless that does not stop bitcoin because the more some government ban the more bitcoin continues to grow.
Bitcoin cannot be stopped, provided there are bitcoin users who trade and invest, bitcoin still exists. The government cannot stop bitcoin, but can ban it from being used in that country. Because all transactions occur on the internet, no one can monitor. So bitcoin is growing and becoming big because of the growth of the bitcoin user population.