Deep Tide TechFlow News, on November 29, on-chain detective ZachXBT reminded users to strengthen account and fund security. He stated that currently Yubico (security keys), Proton (email service), and Tutanota (email service) are all having discount promotions. Proton supports Bitcoin payments, while Tutanota can use Monero (XMR) to purchase gift cards through official partner ProxyStore. In addition, hardware wallet brands Trezor and Ledger have some products on promotion. ZachXBT advised users to avoid using Gmail or SMS 2FA (two-factor authentication) and switch to security keys or hardware wallets for storing funds as soon as possible.