[2021] Someone is trying to take legal action to get my name.

Hi I've had my name on twitch for years now, I mainly use it to watch streams or stream to my friends. Yesterday i got on my phone recently and I saw I had a whisper from someone who wants me to change name because hes a "big shot" and hes coming from youtube to twitch. He Sent me a twitter handle that belongs to a new org and youtube page to verify hes "big". I really like my name and I do not want to switch it. I decided not to reply because on mobile I cant even tell when he actually sent the message. Today he sent a message saying he will take legal action if I do not change my name and let him have it. This in turn has given me anxiety since my friends says if hes big twitch can give him my name. My thought process is now I got to stream so I can show I'm active and maybe just get a little following so he cannot get my name but at the same time I'm so awkward and not very entertaining. So what I'm trying to say can he really take legal action against me to have my name?