Yes, banks are dangerous to the economy because don't care about anything more than their own profit. Many times have I witnessed the selfishness of the bureaucracy which is implemented in banking system. They don't care about people, nor economy of a country they work in, just profit. This claim is best evident in many charges applied to their clients.
Yes, banks are dangerous to the economy. They provide a legitimate service to consumers. However, banks have a tendency to be greedy, and that's where the dangers lie. High fees, predatory lending and discrimination against small businesses and businesses owned by citizens of color threatens the strength of the economy. It also further opens the divide between the 1% and the rest of the country.
Banks themeselves are not dangerous to the economy. Rather, banks are necessary for an economy to grow. Without banks, money would not gain value; trading and bartering are useful in a small scale but without the ability to borrow and invest large sums of money via banks, the US economy would not have been able to grow into the powerhow that it is today. What is dangerous to the economy is lack of proper oversight and regulation.
No, banks are not dangerous. It is my belief that banks are the regulators in the economy. The economy works on the basis of buying and selling between individuals and institutions. Banks are where we can keep the money safely, track the flow and measure how well each is doing. Banks also provide convenience for sending and receiving money, not just locally but internationally. Imagine flying with cash every time you need to do business, it seems like a bad idea.