It might appear to be a tiresome or boring formality, but an online dating profile is important. It sets the tone for how potential romantic matches see you and perceive you. By the way, there is no right or wrong profile pic for Internet Dating.
If you are a woman and your profile picture is in a skimpy bikini, you are going to be perceived as possibly flirtatious and sexy and probably get a corresponding response. If you are a woman wearing a business suit, sitting behind a desk, you are going to be perceived as serious and corporate, perhaps a bit more formal. If you are a guy and you are not wearing a shirt, you are giving out a certain message. If you are a man in front of a private jet, you are also giving out a certain message!
If you want to do the bikini thing, go for it. That may well be the image you want to put out there, and that is fine. Young people do totally different profile pics to older people. We would suggest though that you put a profile pic on