Security.

Explanation:

Cryptocurrency is a digital asset that needs to be stored safely to avoid any theft or loss. There are various options available to store cryptocurrency, but some are safer than others. The least safe place to keep your cryptocurrency is on an exchange. Here's why:

1. Exchanges are centralized: Exchanges are centralized platforms that hold a large number of cryptocurrencies. Hackers can target these exchanges and steal cryptocurrencies in bulk.

2. Exchanges can be hacked: Exchanges are vulnerable to hacking attacks. In the past, many exchanges have been hacked, resulting in loss of millions of dollars worth of cryptocurrencies.

3. Exchanges are not insured: Unlike banks, exchanges are not insured. If an exchange gets hacked or shuts down, there is no guarantee that you will get your cryptocurrencies back.

4. Exchanges can freeze your account: Exchanges have the power to freeze your account if they suspect any fraudulent activity. This can result in you losing access to your cryptocurrencies.

5. Exchanges can be regulated: Exchanges can be regulated by governments and can be forced to comply with KYC/AML regulations. This can result in your personal information being shared with government agencies.

Conclusion:

In conclusion, keeping your cryptocurrency on an exchange is the least safe option. It is recommended that you store your cryptocurrency in a hardware wallet or a cold wallet. These wallets are offline and offer better security for your cryptocurrencies.