No problem using Binance C2C in Hong Kong, you must first deposit into the exchange to trade within the exchange.

In Hong Kong, preparing to buy USDT at an OTC physical store, is this method the same as offline trading? I saw a post yesterday saying that buying USDT might lead to getting black USDT, and there is a risk of the platform freezing USDT. Is that true?
I have no previous experience. When buying at a physical store in Hong Kong, can I choose to receive USDT in my Binance account or in a wallet address? If both options are available, which is better: receiving in a platform account or receiving in a wallet? Receiving in a platform account is T+1, right? Wallets have no restrictions. I plan to use the web3 wallet integrated with Binance, which I haven't activated yet. Should I activate it now?