Well this depends with what your skills are, if you are good at it then you can do it by all means but if you are not then its better to stick with what you are comfortable with so that you don't end up regretting doing it in the first place after going through a massive loss, in forex you are rewarded for what you are able to do, so it is always good to stick to what you know and avoid unnecessary risks that can turn around to bite you back.