When people say that Bitcoin is digital gold, they don't actually mean it in a way that you can use Bitcoin for jewelry and for whatever industrial use gold has. They mean it in more in a economic/finance perspective, where people buy gold as an economic hedge.
And yes, what you've listed is what's mostly Bitcoin is "promoted" for. Chamath Palihapitiya, a Bitcoin whale and a famous investor, even called Bitcoin "schmuck insurance".
As for telling people to buy Bitcoin, I personally really don't like telling people what to do with their money(mostly in person), but you do you mate.