How do institutional investors store and protect their Bitcoin assets?
Institutional investors, such as hedge funds and corporations, have different ways of storing and protecting their Bitcoin assets than typical user wallets.
I suppose they can afford secure storage for seed phrases, they can use storage facilities of fiat banks, also, some can use secure data storing servers... There are many options which can be used for storing wallet data, even if there are thousands of cryptowallets. They can simply store data in a way they store digital fiat money and cash.