https://howsecureismypassword.net/https://www.microsoft.com/security/pc-security/password-checker.aspxIf you have more than a few BTC, anything less than "Best" is unacceptable - that should be your
starting point. Having a password of "larry123" is like leaving your wallet and banking info laying out in the street.
Just. Dont. Do it!Ideally use letters, numbers, and symbols in combination. Something like @@@@@applebeesmakesmevomit12345&&&&& is pretty secure and easy to remember: 5 symbols twice, 5 numbers once, and a phrase you wont forget. But you can do much better: using the maximum amount of variation in the characters and words that arent in the dictionary, upper AND lowercase, and avoiding
sequences like 12345 make for even stronger passwords: *@%#!59771bLoRgBrAbBlEfLaPpEr87651*@%#! is virtually uncrackable. Again, all you have to remember here is one series of symbols, two sets of numbers, and one gibberish phrase in alternating upper and lowercase. Also consider using a password manager. Read more here:
http://www.trackvia.com/blog/productivity/how-to-make-uncrackable-passwords-you-can-rememberhttp://www.microsoft.com/security/online-privacy/passwords-create.aspxhttp://www.thegeekstuff.com/2008/06/the-ultimate-guide-for-creating-strong-passwords/Also, always
create multiple backups, usually 2-3 USB flash drives are fine for small amounts, but if you have a lot of BTC or LTC, you will usually want to
use more than one wallet to spread it out over, and back up the keys for each wallet multiple times to
multiple physical locations. I advise against using online wallets. Use extra hard drives, flash drives, your phone, your girlfriend's laptop, whatever. As long as your password is very secure, you wont ever need to worry. Just
back that shit up. Because if the wallet is lost, having an uncrackable password cant help you.
If you do this, the chances of your bitcoins being lost or stolen is very low - just dont forget your password!
How to Avoid KeyloggersThe easiest way to avoid any type of keylogger is simple: type part of your passphrase into a blank document, and copy and paste it into your wallet. Then type some random gibberish into your open document. Then type another part of your password. Copy & paste. Repeat. Doing this 2 or more times makes it virtually impossible to have your password stolen via hardware or software.