It simply means an ever increasing number of financial institutions worldwide will refuse to take clients that are US persons, and avoid the entire issue. By the way I would not be surprised if many Bitcoin related companies do that by the way. For example both Forex brokers that trade Bitcoin CFDs, AvaTrade and Plus500, do not accept US Persons as clients.
It only makes business sense with the other world markets now opening up.
If the costs are great to administer vs the value the client may have given.
However bassed on the request that all businesses and governments world wide be responsible to the success of this emerging technology sector Recommendations made before the senate concerning cryto-currency and how not to make drastic policies that would take it "off our shores" and our of our reach.