As I looking at some news today, I saw this one that has the same problem with the other banks all around the world where they sometimes restrict you to get your own money and they ask you for some valid reason which not all people needed to do because first of all, it is his/her money.
That's how most banks operate; they may not restrict you from withdrawing your funds, but you must follow the proper procedures, which will take time.
Such large sums of money should be invested in Bitcoin rather than simply keeping them in your bank account, because the government may have a close relationship with banks and may investigate and compromise your privacy in the name of investigation. Bitcoin and cryptocurrency have made it possible for us to be financially secure, as we can invest large sums of money and be in control, rather than any bank or third party.