Regarding the scale of what a billion dollars even means, I've recently been thinking of an example which I think might work (but I haven’t tried it on many people yet).

There are 86,400 seconds in a day (24 hours * 60 minutes * 60 seconds = 86400). Now let’s say you spend an average of 1$ every second. That’s every second, including when you’re sleeping or on the toilet. That’s 86,400$ per day, which I hope we can all agree is a lot of money.

If you had one million dollars, to spend it all it’d take you over 11 days (1,000,000 dollars / 86,400 seconds = 11.57).

If you had one billion dollars, to spend it all it’d take you over 31 years (1,000,000,000 dollars / 86,400 seconds / 365 days = 31.71). That is an obscene amount of money.