According to ChainCatcher news, the well-known crypto KOL @ErgoBTC posted on social media that there are 60,000 TRC-20 BTC on the TRON network that seem to have never been backed by actual assets. These possibly unsecured BTC are currently stored in the JustLend protocol. This This means that unsecured TVL has reached US$1.8 billion, accounting for approximately 50% of JustLend's current TVL.
@ErgoBTC added that compared to WBTC, BTC (TRC-20 BTC) on the TRON network can be said to have no transparency at all, and the custodian information is basically unavailable. After manual investigation, the supporting asset addresses of a total of 114,000 TRC-20 BTC on the TRON network cannot be clearly found from the Bitcoin blockchain. (Source link)