Nothings perfect. I think if you use a reputable register with support and a paid email host with support you have less risk than a gmail where they can lock you out and you cant do password recovery because some filter triggered.

I would add two other things. - Prepay the domain for a large number of years (10y) to avoid billing issues. - Keep a local copy of your email on atleast one machine (either just in a desktop client, or do regular exports).