Is eating 8 eggs a day bad?

That may be excessive, and I certainly wouldn't recommend it. ""The science is clear that up to 3 whole eggs per day are perfectly safe for healthy people." More info below.
https://www.healthline.com/nutrition/how-many-eggs-should-you-eat

I have been eating 20 whole eggs every day since 1976. Guess who's alive?

not to me, and if you ate cage free, you'd love the flavor...I love eggs too, especially [cage-free ] but I had to switch to beans for it's location, and I love the whisk broom effect it has on me.....

Some studies have linked high egg consumption to heart disease. Eggs have so much nutrition though. It's a tricky subject. 

If you workout, it is not bad.

Depends on what else you eat over the day, if thats all its bad, if you eat a balanced diet of fruit and veg in addition its fine.

it could make your cholesterol go up

No. As long as you don't get sick of them. Not too bad on calories. Good protein. Some say "high" in cholesterol.  So...go get it checked if you are worried. If that is all you are eating...maybe not enough calories to maintain weight. Maybe you are trying to lose weight? 600 calories plus toast...maybe 800 total...not alot of calories.