might be better if you don't invest at the moment, it seems like you need to do more research on what you are trying to invest in. for example, as other members have mentioned, Trust Wallet or Binance? should be the last place where you keep your BTC, especially if you are going to hold.
You are correct, mate. It would be wise for him to learn more about bitcoin before making an investment. Avoid acting too cleverly by asking questions you don't understand. Instead, try to research and understand the type of wallet you intend to use and which can be very secure for a long time. Although all wallets aren't perfect, it all comes down to how you keep your secret keys and don't divulge them to anyone.