Not sure big banks, brokers, etc. fear cryptocurrencies. They are already starting to happily make money of those and sell products around them. Banks worked ha

Not sure big banks, brokers, etc. fear cryptocurrencies. They are already starting to happily make money of those and sell products around them. Banks worked happily in the past with decentralized/local currencies, for example. The concern might be more on the policy and regulatory side of the world.