True and not true. Bitcoin is already in the mainstream but you're right I think bankers don't let bitcoin to get in full power because some are still afraid of this new system and I think bitcoin can bring down a lot of big comapanies and maybe even banks and this makes bankers to fear bitcoin.
Bitcoin has become a mainstream cryptocurrency for several countries including America, because of the recognition from banks that bitcoin is a digital currency. This recognition changes the perspective of society and companies about bitcoin