BITCOIN is challenging $$$ hegemony and strengthening rogue states.
It is a borderless currency that has enjoyed mind blowing growth.
The blockchain technology behind bitcoin acquisition is open to anyone, regardless of location, that is, with a virtual wallet
Good Side
USA has personal issues with Iran as a result of power struggle in the Middle East. This has resulted in baseless economic sanctions on Iran citing nuclear arms development as a basis, something Obama took care of. Citizens are bypassing this sanctions using Bitcoin.
Venezuela has announced it own crypto currency, the 'Petro', to fight USA financial blockade
China is introducing petro-yuan into oil transactions to minimize USA influence
USA perceives Russia as a major challenger of its global power and has under many guises. Russia is currently hit hard by USA oil sanctions and analysts are saying Russia could move to stop $$$ in trading crude oil and using cry to currency. Popular in Russia 'Etherum' and PutinCoin - after Russian president, Vladimir Putin
Lastly crytocurrency is really helping poor communities in Africa, Asia and South America suffering from bad Governance, over population and ailing economies
Bad side
Rogue state like North Korea will likely (God forbid) acquire an ICBM reaching deep into USA and Africa. Crypto currency is a very ideal form of cash for North Korea because with it, money could be moved quickly and across borders, used to buy materials it could use to make an ICBM.
Sadly, it has been reported that North Korean hackers stole $6.99 million worth of bitcoin in one hacking attack : a very substantial amount and a stimuli for further attacks. Other countries might follow suit
Conclusively, crytocurrency good outweighs it's bad