Who should not use cloud computing?

Who should avoid using cloud computing? Is it suitable for everyone, or are there certain types of users who may find it less beneficial or even detrimental? For example, are there industries or types of businesses where the reliance on cloud computing could pose potential risks? Additionally, are there security or privacy concerns that may deter certain individuals or organizations from utilizing cloud services? Understanding these factors is crucial for making an informed decision about whether cloud computing is the right choice for a particular user or organization.