Dear newbies, please treat exchanges, such as Binance, KuCoin, Kraken, Huobi, OKX, and Coinbase, as marketplaces. What do I mean? Just as you do not leave your goods on the market after you have paid for them, you take them home with you. Consider your coins as the goods you bought at the marketplace. Your bitcoins should only be stored in cold storage wallets after purchase, and transferred out when you want to sell them. It takes less than 10 minutes. Remember, if you don't have the keys, it's not your coins.