Would you rather lose your old memories or never be able to create new memories?

If you ask this question to me I would say: I would rather lose my old memories, though the thought of not remembering my grandma truly heartbreaking. I choose this answer because most of my life is about learning things and making new experiences, so I am not sure that I would be happy without being able to create fresh memories in life. Guys, what's your choice, would you rather lose all of your old memories or never be able to make new ones?