Google drive or any internet based storage software is never the best option for storing your seedphrase when we have other better choices like the use of an airgapped device or better still, a less expensive medium like the manual backup using a paper to store you mnemonic seed. 6 or 8 digits passwords can easily get brute forced compare to a 12 random word seed phrase, that is the reason passwords weren't used to encrypt your wallet mnemonic seed because it'll be much more difficult to brute force. However saving your seed phrase in a device which has an internet connection is not the right thing to do, as your screen can be shared even without your permission just by clicking a link or automatic redirecting from our regular internet web page.
Yes, 6 or 8-digit passwords are easily rekt, especially without attempt limits. The ideal is to use passwords with 16+ random characters for greater security. However, a passphrase of 6-8 random words offers equivalent or better protection than complex passwords, while being easier to memorize. See more details on this site:
https://www.useapassphrase.com/And also:
- If your passphrase is a 1 word from a dictionary (aka the 25th word) it is NOT SAFE. Change it to at least a 4 word passphrase as soon as possible
- lonelypumpkins is a better passphrase than hodl but it's not a passphrase than can withstand a few hours of cracking on regular hardware (too short)
- For the Long Diceware dictionary - use at least 4 words
- For the Short Diceware dictionary - use at least 6 words
- If you want to use BIP-39 wordlist as your dictionary use at least 6 words.
- You don't have to limit yourself to dictionary words. The more uncommon word you use the more difficult it is to crack and the harder to remember.
- Don't make the common mistakes people make when coming up with a passwords. Don't use your birthday, people's names, pets' names and favourite places as your passphrases.
- When in doubt roll a dice and pick 6 random words from the long diceware list.
Don't rely on your memory or paper or electronic devices to store your passphrases. - Don't rely on your memory or paper or electronic devices to store your passphrases.[/b]
For encrypting wallets or using as BIP39 passphrase, I recommend using keywords based on passphrases instead of complex passwords, as it's much easier to memorize and easier to write down (without mistakes, since it's composed only of random words).
For other things like social media passwords, banking services, etc. Use an offline password generator like keepass to create and manage complex passwords.