One day, I want to buy a lion cub, but...?

In your daydreams, anything is possible. Never give up on your daydreams. In real life, no, it can never happen. Can you imagine the size of litter box you would need, if you could litter train a lion? Not to mention how much food this bad boy would have to eat every day. You definitely do not want a hungry lion on your hands. Cute little lion cubs grow up to be big hungry lions. With very big very sharp claws that will need a very very big scratching post. Lions are wild, outdoor animals, they would really not enjoy living inside a house. They would prefer a very, very big yard where they could run and run.