i use an online wallet: ethereum-wallet.net. I heard that online wallets are risky but so far I havent had any problems. Of course if you have a lot of crytptocurrency, you should probably use an offline wallet to be absolutely safe.
Maybe today or up to a month or a year then your funds will be safe in online wallet, but put your funds in online wallet is not safe for long term, you should immediately use the offline wallet, it is important and strongly recommended especially if the funds Which you have in large quantities.