This is an interesting question. A data centre is a highly secured computer environment, much like a bank. It’s protected and monitored with far greater levels of security than any home or business computer. But that’s not really why it’s secure for you.
Your BankVault virtual machine, when it’s created in the data centre, exists only as data spread across the facility’s numerous servers by virtualisation, load balancing, and other data centre management software. An attacker who did get access to the data centre would still not be able to access anything tangible.
Furthermore, your session is temporary. You will never be there for very long, or in the same place again.