Use Coinbase,Lose Your Bank Account

I have been seeing reports of Banks closing customers accounts because they used Coinbase to by cryptos. Can they legally do this? I have been planning on diving in to the crypto world but this scared me. I can't afford to have my account closed. I am just wondering if anybody that knows the law if this is legal for them to do. It is almost like they are scared and are lashing out because you are taking money away from them. I believe cryptos is for the people and it can finally free us from these corrupt banksters. Is there a better method to get into these without using your personal bank account? If so, please let me know. I want to start purchasing some cryptos, not in a big scale but small amounts. I am a regular working man and do not have thousands to invest. Have any of you known someone whose bank account was terminated because of this? If yes, did they go to another bank that allows this? Read this story I shared about this if you want to know more.

http://thefreethoughtproject.com/bank-threatens-close-accounts-coinbase/