If USA will ban now,i thinks there will be a panic selling of all bitcoin in the cryto market  and maybe all bitcoiners will be affected if that situation happen,thats why some of ICO now in the USA have an kyc,maybe this is happen now is the reason why they become so strict in terms  of  developing a new platform project.actually there is no chance that bitcoin will be ban in the USA because mostly of the big player i thinks is coming from the USA.