The threats? That there is a system out there they can not have any control of, pull the plug, and what's most threatening for those elites, everybody around the world can have access to it!
Banks made a fortune over several hundreds of years and were the financial gods! They decided, together with the politicians, how wealthy and properous the rest of us were allowed to live.With open decentraized cryptocurrencies there is a small possibility to escape out of that cage!
This doesn't mean you will not have to follow the rules, but cryptos may give you a chance to live with more independence and financial freedom.