Yes; There are number of ways:

• Whenever you are using your hot or cold wallets, always make sure you are using a VPN (Virtual Private Network) some examples of this are NORD and TOR (the Onion Ring). This helps protect the data traversing the internet and also can mask your source location from potential hackers.
• Never - ever share you private key or keep it recorded with a photo or online anywhere.
• IMPORTANT: Ensure you write down your recovery pass phrase words for both Hot and Cold Wallets (once you lose this, if you have lost or damaged your phone or wallet... "IF YOU DO NOT DO THIS....YOU WILL LOSE ALL OF YOUR CRYPTO FOREVER"
• Use a permanent recording system for you recovery phrase such as our Cypher tag System (the only one in the world that uses encryption to protect  the stainless steel tags). There are other systems out there, however we believe ours is the best in the world.

Hands down, YES! cold storage wallets do not ever "Broadcast your private keys on wireless, bluetooth, wireless or the internet.

Used for:

Ultimate protection of your crypto:

- Against theft

- Allows multi parties (such as businesses and corporations to work with the same crypto wallets. (yes you can have multiple wallets with the same crypto cold storage addresses and configs.

- Allows safe long term family estate planning with solicitors. contact us at help@westycrypto.com if you need consulting on this to ensure it is done correctly.

- Allows trust less (neither party knowing one another) global transactions with goods and services using digital contracts and escrow companies to ensure the safe transaction creating a simple win win solution to even large denomination transactions of any type. A digital escrow company is appointed to facilitate  the transaction without the huge costs of solicitors and other third parties to ensure the terms of the digital contract are complied with and 

Multi Sig (Multi signature) Is maximising the technology of digital currencies. These can be used to protect someone stealing the crypto as multiple keys must be supplied to allow the crypto to transfer out of the nominated wallet. There can be up to 7 keys and any combination of 2 - 7 keys required to release the crypto from the wallet. 

This works well for protecting your crypto if you are a business and need different levels of multi sig security to release fund from a wallet that has a high value in it.

For Example you may had crypto limits to $10,000 value that only requires 2 of the 7 executive private keys to allow the transaction to complete. but you may want 4 or higher required to release values of over $10,000.

This is also great for a basic level where you just simply want 2 signatures that are needed to release your crypto, so it a thief gains access to one of the 2 keys, your crypto is safe.

Some Examples of these multisig wallets are:

Electrum 

Click Here to see the Video on how Electrum works

Armory 

Click Here to see the Video on how Electrum works