Observing monkeys in their natural environment is better than keeping them as pets. Due to their infantile nature, they need much time and devotion that the owner cannot provide. Primates never reach adulthood or maturity. It would not be fair for anyone who does not have enough commitment and attention span available, which caring for such an animal requires every day. Ultimately, owning a monkey as a pet isn't advisable since wildlife must remain in its habitat – where wild animals live with all elements necessary for fulfilling their crucial needs.