Indeed. This is not even the case to discuss about as there is no way we can stop individual person from selling his or her coins like that. People are here to make genuine profits, nobody is going wait for nobody and thus this system will always stay the way it should be, decentralised! Without this term the crypto currency is incomplete and thus I would say that the decision making process in this market is all about how much you want to earn or even loose. Its not like stock exchange where broker does the job for you and if you lost then lost and if you won then you won!