Creating and maintaining many cryptocurrency is a good way to keep your asset safe, splitting your assets into multiple hardware wallet keeping one in a cold device completely is having an extra layer of security, which is you don't sign approval with any of the whole device . Having multiple crypto wallet prevents you from losing all your funds to attackers ,and in other for you to have a crypto tracker portfolio, you have to trade three different cryptocurrencies .

In other for you to take proper care of your wallets you need to hold most assets in self-custody wallet because Self-custody is extremely important keeping control over your crypto asset .

Use different crypto wallet for different purpose .
Creating many wallet addresses connected to the same seed phrase and private key is like having multiple bank accounts with same like login details which  is not good, especially regarding the ability to become stronger against hackers and implementing access controls.

For example when you divide the company's assets into multiple crypto wallets with different seed phrases is advisable. Putting all together in a wallet can make seeing your company's crypto finances difficult, Instead, consider maintaining at least three crypto wallets,one for receiving payments, another for paying expenses, and a third wallet that acts like a savings account.
Using a different account helps you track your crypto finance ,also helps to implement proper financial control and having a clearer way of managing your crypto wallet,also securely managing your wallets' seed phrase .