In my opinion, blockchain wallet is the most secure online wallet. All user information is encrypted and it is possible to enable 2step login.
The exchange part of this wallet is also very simple and reduces reasonable fees. I only use this wallet to store ethereum, because the number of currencies that can be stored in this exchange is less.
Also, for example, wallets like uphold can make a profit by holding, so I only use blockchain wallet for high amounts that I am looking for good security.