In my opinion a principle point to consider concerning cryptocurrencies is the drive by governments not banks, to cashless societies. Where notes and change will be gone leaving only silver and gold coins remaining possibly with their status as legal tender removed.
Banks maybe powerful but power is in the law and that resides within goverment.
FIAT - not that one stupid -
However there's one thing they're not. Cryptocurrency.
Tangible and electronic FIAT money supply can be inflated or deflated aka fucked with.
It is through this ability that central banks and the banking families behind them cause economic booms and busts. Allowing them to financially rape the citizens of all nations by buying for pennies on the dollar real assets of the people after a bust then selling those same stolen assets for huge profit in a boom.
Due to Bitcoin's limit of 21 million coins the ability to expand and contract the money suply is removed. However be aware not all cryptocurrencies have a set limit built in to their blockchain.
If people really do seek freedom from Luciferian slavery as more and more people do, then Bitcoin and the like provide a growing platform that is in its infancy.