Ledger Nano S is our best choice for cryptocurrency security.

Cryptocurrency hardware wallet

Ledger Nano S is a Bitcoin, Ethereum and Altcoins hardware wallet, based on robust safety features for storing cryptographic assets and securing digital payments. It connects to any computer (USB) and embeds a secure OLED display to double-check and confirm each transaction with a single tap on its side buttons.

If you are doing lots of trading and want to keep your investments secure, a hard wallet is recommended to do the job.  We use Ledger Nano and recommend it.  Check it out for yourself to see if this is the wallet for you.