When Electrum wallets are synchronized with malicious servers, they are instructed to "update" clients provided by hackers, resulting in the loss of assets contained in older versions. Previously, in December 2018, Electrum.
By default, electrum wallets are randomly connected to a set of Electrum servers. From a privacy perspective, this is not a good thing because it discloses your wallet address and balance to unknown third parties. And unfortunately, many public Electrum servers are run by individuals or groups of blockchain analytics companies or worse. Therefore, if you are using an Electrum wallet, it is generally recommended that you run your own Electrum server and then connect the wallet to that server.
Xiaoxuan: In terms of asset security, the node Wallet built into the phone is a centered multi-chain wallet, how to ensure security? I contribute my behavior data, how can I protect privacy?
As for how to transfer money to my wallet, I will write a special topic on how to transfer Bitcoin?
Wallet Qtum Electrum

How long does it take to send Bitcoin to my platform account wallet or mention my local wallet from the platform account?
How to do it: Go to mobile wallet-my-security settings-account backup-enter wallet password-back up now.
Electrum users are reminded of the Update Tip, which indicates that the new version of Electrum is likely to be fake, and if installed, transfer Bitcoin out in another security environment in a timely manner.
You can use Security Seeds to recover your wallet on any Electrum client, even on the Electrum Wallet online web program.
DeViable Security Labs hereby suggests that versions of Electrum below 3.3.4 are vulnerable to such phishing attacks, and users using Electrum Wallet are requested to update to the latest version of Electrum 3.3.8 via the official website (electrum.org), which has not yet been officially released, and do not use the link in the prompt to avoid asset losses.
The Electrum team has also been developing other features. Electrum Wallet users can view the full release notes here.

Electrum Litecoin wallet.
Rusnak shows how to set up this feature with an Electrum wallet. If JavaScript is disabled in the browser, turn it on.
It was the first time I had imported my brain wallet private key into Armory, and I had completed a 1BTC transfer and was trying to delete the Armory wallet with my brain wallet private key, but I didn't know how I felt I should point to see if the balance under my brain wallet address was correct. This view scared me to death: I found that the BTC balance on the address of my imported brain wallet was zero! The wallet address there is an address marked Change, the balance is exactly what my wallet address should have. Instantly I petrified: I just turned 1BTC out, how could it transfer the remaining BTC from my brain wallet to a new address in Amory's wallet without my consent? If I had just deleted all the Armory Money package files, wouldn't my BTC have been lost? It's dangerous.