The latest research report of Deepsafe Research team mentioned the BUSD of Jin'an, the HUSD of Huobi, the WBTC of Bitgo and the renBTC of Alameda Research These on chain assets, without exception, were supported by large institutions and once thrived, but later gradually declined or even completely declined due to various reasons How can the custody model of on chain assets avoid excessive control by a single force? This could be a significant issue