How much butter is safe to eat daily?

For years I didn't eat butter or even any kind of margarine due to thinking it unhealthy. Anyway, I've decided that fat must be important in the diet and over the last few weeks I've introduced 500grams of 80% fat butter weekly to my diet on top of about 2 boiled eggs daily and a tablespoon of Extra Virgin Olive Oil. The rest of my diet is 2kg of fruit and vegetables daily, wholewheat pasta, Weetabix, low fat dairy and a chicken breast. Is a 500g tub of 80% fat proper butter (Kerrygold with no vegetable oil) too much or healthy? I'm 48, 5'11" with athletic physique and weigh just over 14 stone. Please no spam or acai berry answers as they will be reported.