Bolivia did not ban bitcoins. Bolivia's banks did.
Nevada, New Mexico, Arizona, etc. are not warning against using bitcoins. Their banks are.
Saying that a country bans bitcoins when their main banks ban them is like saying that a country has banned Whoppers because McDonalds in that country has banned all Whopper sales in their restaurants.
News alert, banks do not transfer bitcoins. Banks do not hold bitcoins in their accounts. Banning their use in their banks is meaningless.
It may be but most of the time banks controls governments.