One issue which has been built in the blockchain and crypto-currency technology is the ‘rent seeking’.
The user and trader of crypto-currency has to pay for everything, like for ex. getting utility or just transferring coins.
Another issue is the control of insiders - initial investors and developers over their specific coin.
Such control allows them to ‘rig the game’ in their favor - issue coins for themselves, sell coins ‘under the table’, get a large part of the block creation award because of their large stake, etc…
