Once you have started building a significant or long term portfolio, you should seriously consider investing in a secure wallet for your Cryptocurrency storage needs.
Ledger Nano is the first and only certified hardware wallet. The Ledger supports over 1100 currencies. The device is controlled by only 2 buttons and with the back up password if your physical device is ever lost or stolen you will still be able to secure your Cryptocurrency. Shipping is free!
Please note, from experience you will probably want to limit the Cryptocurrencies to under 5 on any one S device as the memory is kept purposefully small. This is not applicable if you are purchasing the X which has a greater capacity so you don't need to uninstall the coin apps.
Please note also, you should always securely back up your private keys in at least 2 separate physical locations and never online. If you don't own the private keys you don't truly own the coins. You may like to also buy the Nano X (also available as a bundle package through the above link) which allows portability.
If you have the funds then I would urge you to get a CRYPTOTAG to provide you with quality, indestructible security for your backup passwords. CRYPTOTAG allows you to physically hammer your backup codes into pure titanium so that your codes are safe and protected from fire, flood and aging. Read more about CRYPTOTAG here.