[ValentineC]

The first few exchanges that traded it were unfortunately the subject of hacks, and I'm still trying to figure out how someone managed to compromise my Nanowallet.io wallet when I believe I've taken reasonable measures to secure the key and seed.

[leppr]

Download the wallet to your computer, most often than not these web wallets are open-source and available on Github.

The problem with a web wallet is that since clients potentially re-download the app everytime they use it, the server can be compromised and malicious updates pushed silently, selectively, and make many victims in a short window of time.

This has happened several times in the past:

https://cointelegraph.com/news/myetherwallet-warns-that-a-co...

https://mashable.com/2017/12/21/etherdelta-hacked

[oarsinsync]

I can't speak for anything specific, but when it comes to crypto wallets, you should try to always use an offline application to generate your private keys.

If you use an online application, it's very difficult to ensure your keys are truly private.