Is it a good idea to run more than one website (anonymously)?

[MUFC 4EVER]

I always have this fear that one day something can happen and your website no longer is good. Like for example Google suddenly de-index you through no fault of own, or something happening like this (I read so many stories).

I am just looking for some sort of security in my life, and if you think it's worthwhile doing?

I would never do anything to harm my website, but would sleep better knowing I had a few anonymous ones (not linked to me) that I had running also should something were to happen to a main one.

They do say not to put all your eggs in one basket, so what do the people do who are making a living on one website like I am doing just now, where it's earning the same or just over the same as a normal job.