#CryptoSecurity101 > Many people enter the world of cryptocurrencies like $BTC and $ETH without paying attention to the simplest security rules!

One of the biggest mistakes is leaving coins on exchanges without enabling two-factor authentication (2FA) or ignoring periodic password updates.

Also, sharing your private keys with anyone, even if they are a friend, is very dangerous.

Beware of phishing links, and do not click on any link you receive unless you verify its source.

Remember that protecting your digital assets is your personal responsibility; no one can help you after a hack!

Make backup copies of your wallets in safe and offline locations.