 Should you use social media? Should we as scientists have a social media presence? If you search online the answer is a resounding yes, but I would argue it's not quite that simple. Most of the content on the topic has been produced by science communicators and other people like myself who are very active on social media. We have a strongly biased opinion. I think it's best to think of social media as an investment of your time which pays dividend in the form of visibility for you. As any other investment there is an opportunity cost, that is, what you didn't do instead. And that's why some people see there's a waste of time. The better answer is thus, it may be worth it, but you should consider the alternatives of what you could do instead with your time.