is this highly projected with security ? and we use this online wallet with our own risk ?
Wallet seems to be online again.
Online wallets are always used at users own risk - standard disclaimer. Whilst all reasonable steps are taken by the devs re security, if a server potentially provides access to a large quantity of coins it will always be a bigger target than an individual's wallet on their PC. It by definition must always be left unattended 24x7 whereas your PC can be switched off when you are not using it. it is merely saying that security can never be guaranteed so don't keep all your coins in one place. Also the server does not stake so if you keep all your coins on it then you will not earn any additional coins the way you would if you kept them on your PC..
Oldandgrey