TLDR, you can't.
nostr:nprofile1qqs2vrneurk665gq6a2rke572y7mc8ppwr5wnd60mw8fwxharc8xsycpz4mhxue69uhkummnw3ezummcw3ezuer9wchsz9mhwden5te0wfjkccte9ehx7um5wghxyctwvshsz9thwden5te0wfjkccte9ejxzmt4wvhxjme0vl44wp would be cool if you answered on Bitcoin Brief 👀
Permanent DMs seems like horrible UX
Discussion
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You can mute it and it will disappear from there
Never saw a mute option in DM tab in nostr:nprofile1qqs24yz8xftq8kkdf7q5yzf4v7tn2ek78v0zp2y427mj3sa7f34ggjcpzamhxue69uhhv6t5daezumn0wd68yvfwvdhk6tcppemhxue69uhkummn9ekx7mp0qyg8wumn8ghj7mn0wd68ytnddakj703s8dt... Only mute/block for people