The "security" of btc cryptocurrency is proportional to how much energy it wastes; that's radically different than the banking system.
The more billions it costs to run bitcoin, the more it costs to 51% attack it. If you can outwaste energy, you can hijack the system.
It would be useful it some state, eg., russia or china, would just cut off networks and forge bitcoin network traffic -- and hence bring the whole thing down. Or, do a 51% attack by controlling 51% of the hashing power.
The whole thing is a joke, one only tolerated by states because it's supports joke levels of economic transactions. Were any % of an economy to run on this, states would just seal the network in their borders and end the whole charade.
The more billions it costs to run bitcoin, the more it costs to 51% attack it. If you can outwaste energy, you can hijack the system.
It would be useful it some state, eg., russia or china, would just cut off networks and forge bitcoin network traffic -- and hence bring the whole thing down. Or, do a 51% attack by controlling 51% of the hashing power.
The whole thing is a joke, one only tolerated by states because it's supports joke levels of economic transactions. Were any % of an economy to run on this, states would just seal the network in their borders and end the whole charade.