Is it better to dye your hair with dye or is it better to bleach your hair? Which one is more safe and better for your hair?

Bleaching your hair is stripping it of all its natural color using harsh chemicals. Dyeing your hair is much safer since its semi- permanent. But if you want to change the color of your hair then the hairdresser will ask you to bleach it first since the color will show well on bleached hair.