Myetherwallet is the best for Ethereum wallet so far but you can use any other wallet like Metamaks, Blockchain, Trust wallet etc. Many of us use Coinbase wallet for Ethereum or Bitcoin hold and transactions. Which wallet you want to use, doesn't factor but main factor is to keep secure your private key, password, backup key. No key, no crypto- if you lose your key you will lose your cryptos. So, it must be concerned.