Safest to store
1) Paper
2) Trezor/Ledger
3) Ethereum Wallet/Software
4) Metamask
5) Mew
Yeah, These are some main options for storing ETH.
I think if you has less than 10 ETH => Just use: Mew or Ethereum Wallet/Software
If you have more than 10 ETH, you should by a hard wallet/ cold wallet, such as Trezor/Ledger