Choose both a registrar and top-level domain for your domain name carefully. Neither your registrar nor your chosen TLD registry should be in the habit of suspending domains at the drop of a hat, or be at risk of going out of business suddenly.
For TLDs, I have said before¹ that if you mostly trust your local government, your national ccTLD should suffice. In fact, it should be your default choice unless you have strong indications it does not fulfill the above criteria.
I mean it's good advice. Often you don't have a choice or at least the alternatives are so bad you'll hamstring yourself by avoiding a potential loss (eg Youtube).
There are risks on another's platform but there can be benefits too.
Notable victims: Meerkat, [0] YOLO and LMK [1].
[0] https://www.fastcompany.com/3043716/twitter-only-gave-meerka...
[1] https://arstechnica.com/tech-policy/2021/05/snap-cuts-off-yo...
This is actually how I run my business. So I post threads on Twitter to get attention https://twitter.com/AdventureMtn/status/1450141976976781312
But I don't care who follows me there.
You will notice the last post I link back to a site that I own and make money from.
I am not advocating building your own Twitter or building your own youtube. Instead I just sell premium versions of what most people would most likely post on Youtube. For example I created a whole video series on a site that I created called gamemarketingideas.com. I charge for that in real dollars not ad revenue or fractions of a cent with affiliate money. I own it. That content could have gone up on youtube but I don't trust a business hosted on the back of Google.
So instead I am basing my revenue on selling it off of a site that I own.
None of this is a perfect libertarian utopia of total self-sustainability. I am 100% not a libertarian. And there is no risk free business.
You just need to reduce risk.
My advice is basically a friendly reminder to be careful with these big tech sharks. Don't put your whole head in the sharks mouth. Instead just put a hand in the sharks mouth. It is less risky that way.
Don't ask me where the shark metaphor is going it is early and I haven't had my coffee yet