I also think that the MyEtherWallet wallet is almost impossible to hack. Somewhere, there was a leak of information about the secret key code. I once had the imprudence to put the purse code in the Mega cloud store, and then very quickly I used my keys and some of the coins that I did not have time to pull out, went to the addresses I could see by etherscan. io. Therefore, you need to be very careful with the keys.