Is PSN still safe to use after being hacked

of cource. psn has fully updated there security and everything. there reputation went down a bunch since theyve been hacked and down for over 2 days but its still completely safe to still use and buy items off of playstation. all there things are completely safe now. im a little bit wavy on using a credit card ( i dont have one im only 13 but still a genuis at games) so probably the most safe way to download items that require purchase i would and still do use the psn gamecards. these can be at every walmmart/target/toys r us. i dont trust target though cause of there game cards so i would prefer to go to walmart.