[jsprogrammer]

What happens if one of the five employees loses their key? Aren't you increasing the risk of bricked coins with each signature that you require? Do you really want your coins to be at risk of brick by three or five CoinBase employees?

[jafaku]

Then make the scheme 4 of 5, or 3 of 5. Besides, the company could keep a backup of the keys in physical locations, and secure them with traditional physical security.