Whether you should use Medium or your own blog will depend on your specific goals and resources. Here are a few factors to consider:
Audience: If you already have an established audience on your own blog, it may make sense to continue publishing there in order to reach that audience. On the other hand, if you are looking to reach a new or wider audience, publishing on Medium could be a good way to get your content in front of a larger audience.
Control: If you publish on your own blog, you will have more control over the design, features, and branding of your site. On the other hand, publishing on Medium means giving up some control in exchange for the convenience and potential reach of the platform.
Cost: Hosting and maintaining your own blog can require an investment in terms of time and money, especially if you use a self-hosted platform such as WordPress. Publishing on Medium is generally free and requires less maintenance, but you may not have as much control over the appearance and features of your content.
Monetization: If you are looking to monetize your content through advertising, sponsorships, or other means, it may be easier to do so on your own blog. Medium has its own monetization options through its Partner Program, but these are only available to a selected group of writers.
Ultimately, the decision to use Medium or your own blog will depend on your specific goals and priorities. It may be helpful to try publishing on both platforms and see which works best for you.