Interesting, is what you can only determine yourself. What I can tell you about is scope. These days many private institutions provide specialization in bachelors courses, but believe me, beyond fancy names, they are nothing else. At a bachelors level, there is nothing much to specialize. You have got to skim past all the basics. Specializations are for postgraduate and doctoral programmes.
Yet if you want to go for these so called 'specialization' programmes, go for IoT or Data Science. They are the two big things everyone seems to be talking about.
Yet if bioinformatics appeals you the most, go for that. You will be better off in a field that you like than one that you have been pushed to.