Is it safe to use Electron Cash now that Electrum for BTC is compromised?
Did they update with new patch already? If not, I wouldn't use and also move your coins immediately to another place. Now that the Electrum's vulnerability is known, storing coins in an unpatched Electrum fork is not advisable.
Edit: Looks like they came up with patch. Here is link to download.
https://electroncash.org/#download After downloading, verifying and installing, create a new wallet immediately and move your coins to addresses in the new wallet from the old wallet, immediately.