If there is a need to store a large amount of cryptocurrency, you cannot think anything better than cold storage. It involves physical access to the information medium, to protect it from any attempts to access via internet.

Ways to keep your cryptocurrency safe:

1. Desktop Wallet: It offers various advantages over an online wallet. These are accessed only via your private computer, with personal security keys stored just on that machine.

2.Hardware Wallets: These are more secure than the desktop wallets. These wallets are bits of hardware, external devices like USB sticks which you can carry around. Hardware wallets are flexible to malware, and if you happen to lose your wallet, you'll be able to recover the funds using a seed phrase.

3.Physical Coins: To purchase the physical coin, you may need to pay a slight premium over the value of the Bitcoin that you're buying.

If you are looking for cryptocurrency wallet or want to know about the security of your cryptocurrency, you can refer to
https://www.altcoinsidekick.com/bitcoin-basic-blog/choosing-the-right-digital-wallet-to-store-your-cryptocurrency.

I also took my first digital wallet with the help of this blog and if you are looking to choose the right digital wallet, I believe that this article will help.