What is the preferred Internet source for sys-net?

Qubes-Whonix
1

I use the chain: Whonix-Workstation → Whonix-Gateway → sys-vpn → sys-firewall → sys-net
I understand that the most secure source of the Internet for sys-net is public Wi-Fi, but I don’t have the opportunity to use it regularly. So I have to choose from less reliable options. What is the preferred Internet source for sys-net?

    • Internet from an anonymously purchased SIM card, which is distributed through a modem
    • Internet from an anonymously purchased e-SIM card, which is distributed through a smartphone (which is used only as a modem)
    • Cable Internet from an Internet provider (not registered anonymously)
    • Another source of the Internet (name it). Thank you.
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