I think you should do both, but to be honest, I no longer use all social media platforms. Even though Instagram was very profitable for me and I have some following there, it crushed my soul and I didn't become happier staying there so I deactivated my account and only use Pinterest for my blog now. This was of course after many years of blogging and building readership, Pinterest followers, brand relationships and strategies and an email newsletter. Whatever you do, make sure you pick one social media network to focus on and pick the one that comes most natural to you, not where your followers are or what you think is hot now, because you won't love to create for it and it will show, resulting in less followers.