While it’s not the most unsecure wallet out there, it’s coming in at number three, due to the fact that it’s the most known. This has made Blockchain Wallet the biggest target for hackers looking to steal your bitcoins. Blockchain is aware of this, and has implemented client-side AES encryption, which protects your walled from a hack of the server. This wallet supports offline transactions as well, and a double encryption process along with two factor authentication. Blockchain Wallet also lets you back your wallet up onto Google Drive or Dropbox, and lets you download your wallet manually. To help combat server hacks, they have set up regular off-site server side backups every hour. They even have a mobile wallet, as do the rest of the wallets on the list.