Where did you see wBTC at $20k? That would be a great arbitrage opportunity since you can still unwrap it (redeem/burn) for real BTC onchain. 
I guess he saw that information in WO because he is active there, and someone posted today that this token has been in a bit of a problem in the last 7 days. Honestly, I don't pay attention to any variations (forks) of BTC, not even to this wrapped version.
No, I did not see this post until now. I saw the chart in Coinmarketcap today, and I just checked again and was shocked. They manipulated the chart for an unknown reason. I am not the only guy who has seen WBTC de-pegged. It was de-pegged for almost all day and now regained the peg. The main problem is they manipulated the chart. They removed actual 24h low data and adjusted it with real BTC. As far as I know, this happened because of a multichain sell-off.
I just checked Twitter and saw a lot of people also tweeted about it;
https://twitter.com/CoinSignals_/status/1679160710394421249?s=20
https://twitter.com/Mysteryofcrypt/status/1679317222106251266?s=20
https://twitter.com/KienThucCryptoC/status/1679165653734002688?s=20
https://twitter.com/TCNCRYPTO/status/1679164554964549632?s=20
https://twitter.com/DuctorMarcus/status/1678901842242158594?s=20
https://twitter.com/shadow_trader1/status/1677233543200616449?s=20
https://twitter.com/cryptomaxx150/status/1679210937956331541?s=20 Video recording.