Your profile picture should match your overall appearance on Instagram. Make sure the colors and style harmonize. If you change your profile picture, make sure that change is integrated throughout your content to ensure a consistent brand message.
Make sure your profile picture is of the highest quality. Use high-resolution images that are sharp and well-lit. Pixelated or blurry images give the impression of unprofessionalism. Invest time and, if necessary, money in a professional photo shoot.
People respond positively to emotions. Your profile picture should convey a positive and authentic mood. Smile if it suits your image. Or at least show an open and friendly face.