I am looking to save my bitcoins in coinbase vault.
Is it secure to save them in it.
Or suggest me some other secure and safe bitcoin vault or wallet.
mm nah , well they are safe for the moment but no one will really recommend you to use Online wallets , it finally ends badly and ugly by getting hacked .
Try to use an Offline wallet like Bitcoin Core or Electrum (Bitcoin COre is pretty good if you don't mind downloading the whole blockchain file) or if you have big amounts of BTC , simply buy
http://www.bitcointrezor.com/ , It's a Hardware wallet and totally secure .
~ Madness