What is the HARDEST COIN in Geometry Dash?

Geometry Dash's Extreme demons like Silent Clubstep, Slaughterhouse, Sakupen Circles, Crazy III, Kenos, or Sonic Wave Infinity or wave spam effect layouts can be interesting but they don't have difficult coins. There are many interesting Geometry Dash levels nowadays that have coins way more difficult then Robtop's levels like Deadlocked and Fingerdash. Can I complete 3 top coin list levels in this GD 2.11 Challenge successfully?

Links
Edited by ‪@SubStra‬
Membership: youtube.com/channel/UC6q-2pb_iCy-bycBBNZ22AQ/join
Coin List: discord.gg/zu29wZB
Discord: discord.gg/S7JmmCt
Twitter: twitter.com/MatMartM
Music and Credits: pastebin.com/ZcRXgp5G