When is it worth to not rebirth?

https://preview.redd.it/z2yatl725eje1.png?width=1016&format=png&auto=webp&s=469bc147fe252160bf9c825ae646d193b5b2d646

I am currently at rebirth 7, I was planning on getting to 10 tonight so I can get 100 percent build speed, but then I was thinking, is it really worth it? I want the best odd's of a titanic and a ton of huges, so if you can help me, please help!