im thinking of becoming a member, but i want to no if its safe, i dont want to put my credit card on this and then get all my money taken out
It's safe. Only the amount of the cost for the membership will be taken out.
Many people have member, one of them being me and I completely trust the BC company. You have no need to worry. If you are wondering when you will get the membership after you buy it, you will get it right after the purchase goes through. If you are in-game when you buy it then re-log and you should have membership if you pay with a CC.