I think you should be yourself on social media to relate to your audience. Please, don't post travel pics during your trip or you could be sorry when you get home. So many ppl do this and it's an Internet no, no. It opens yourself up to being robbed. No you know your audience better than I do. It also depends if you have built yourself as a personality or an expert in your field. A personality is themselves sharing a variety of topics an expert sticks to their field with their posts. An If your main content is "technology behind cryptocurrencies" I would NOT take a month break from that topic to post travel pics for weeks on end. It can turn your main audience off. You can sprinkle in pics here or there after your trip and write a few short blurbs about the trip. Placing pics on visual sites like Instagram or Pinterest are fine on a serious business blog NOT so much. That's when you're better off saving your pics for FB. Hope this helps some.