Combining KYC with non-KYC transactions exposes the connection between them, rendering your non-KYC UTXO traceable back to you. Essentially, it diminishes the anonymity of your non-KYC holdings, making them redundant, as it becomes evident you could have just acquired KYC-verified assets. Despite this, engaging in three or more mixing processes through CoinJoin helps restore privacy for subsequent transactions. However, it's crucial to note that the consolidation of KYC and non-KYC UTXOs during this process discloses your increased Bitcoin ownership to those aware of your KYC UTXOs, and this revelation is irreversible.