Yeah it is, I thought of Jaxx being one the most secure Crypto-Wallet out there. It probably still is, considering that many of us trust their services and when money is on the line, Security becomes our number priority now that we are in charge with being our own Bank. Even the Developers know the Risk of safely storing Cryptocurrency, recommending that we use Hardware Wallet, which is a good idea however you still got to trust a third party in the end of the day. Paper Wallets are the way to go but too complicated for some. It's best to just diversifying into multiple Cryptocurrency Wallets, since it's unlikely that Hacker can hack you on multiple devices at once