The easy answer: whenever you have something meaningful to say to the global business community.
The hard part about that easy answer: you have to work at filling the pipeline to be recognized as an authentic, reliable, and eagle-eyed contributor. For you, whom others will put their own reputation on the line to share your post, add a comment to thank or expand on your idea, and still offer your knowledge, feeling, belief, and call to action to make you worthy.
Not solely from your POV, but from the readers’.
Easy? absolutely not. You serve two masters: 1) yourself via your frequency of contributed quality material, and 2) your audience via their appetite to spend time to review your intelligent gifts.
Worthwhile? Oh yes, you will see steady growth of followers of your shining light when you find your footing, establish your gait, find your inner voice, and marvel at the listeners who thank you for your observation that truly helped them.
Take a bow. Encore, keep it going.