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.