There are many online wallets available, which offers various features and tempting rewards. And I have seen most of the newbies join those, in the greed of exciting rewards and cashbacks, but remember one thing, online wallets are traps. You never completely own your wallet. If possible always go for cold wallets, Electreum will be best wallet, which is currently available in the market. If you want to invest more, you can also buy hardware wallet like Trezor, which will give you top most security to your coins. But these hardware wallets are generally expensive, so choose the wallet accordingly.