Yes you can eat butternut squash seeds if you want too.
Butternut Squash seeds including every other type of squash seeds are edible and can be eaten along with the squash.
I like to eat my squash seeds after roasting them and roasted squash seeds including butternut squash seeds are high in fiber and are also rich in vitamins and minerals like vitamins A & C, folate, potassium, calcium and iron.
All those things are good for your health and can help you live a long and healthy life.
I love to snack on roasted butternut and other squash seeds and they're a healthy snack too.