Can I cash out millions from my Coinbase account?

Hello, I am a cryptocurrency investor and I have a question. I have millions of dollars worth of crypto assets stored in my Coinbase account. I am considering cashing out some of these assets. However, I am not sure if this is a good decision or not. Could you please provide me with some advice on this matter? I would appreciate it if you could help me understand the risks and benefits of cashing out my crypto assets, as well as any potential tax implications or legal issues that I should be aware of. Thank you for your time and assistance.