My bitcoins are still in the wallets plus I didn't hear any news of hacked blockchain.
I believe this technology is hugged strong and there's no way to take it down. I request you to post any source link here so we can be more careful.
I think you need to heads up on this board,
Web Wallets and use the search button engine on the forum and probably you will be shocked that there are too many of them who created a lot of threads towards this web wallet. Technically, this web wallet is very buggy and low response in support team, bunch of complaints against them. If you have huge of Bitcoin amount, I suggest to use hardware wallet.
On the other hand, don't trust wallet that you didn't the one who control the key (not your key, not your Bitcoin). Once your email account were hacked, goodbye to your Bitcoin.