The more security features the better! Especially with all the Chinese fakes. I saw a guy walk into the coin shop I go to locally with a 1 oz Australian Gold Kangaroo only for it to be XRFed and determined to be a fake with 40% gold. Poor guy paid $1700 for it. If you don’t know what the new security features are they are: - waves in the background that ripple when turned under a light. - a padlock that turns into a trident when turned in the light. - microetching of “decus et tutamen” (translation: “An ornament and a safeguard”). - distinct lines in the Union Jack flag. - a few others I can’t remember. Here is a pic of my older 2015 Britannia and the new 2021 Britannia. note: the gold ones have the same security features.