I am a bit perplexed about Binance recommending self-custodial wallets, heavily promoting its own Trust Wallet[0]. They are even offering zero withdrawal fee for transfers from Binance to Trust. Given that only the core of Trust is open-source [1], is it possible that the closed-source parts contain some backdoor?

[0] - https://trustwallet.com/

[1] - https://github.com/trustwallet/wallet-core