[taberiand]

I think it's good advice, when placed in the correct context.

Live every day as if it could be your last - to me it's about ensuring you always strive towards being your best self, in the context of the virtues (wisdom, temperance, courage and justice) and the Stoic duty towards society.

Giving the finger to the world and living a hedonistic lifestyle is decidedly not Stoic.

Putting aside the distraction of past and future and focusing on the present is a Stoic ideal though:

"I have to die. If it is now, well then I die now; if later, then now I will take my lunch, since the hour for lunch has arrived - and dying I will tend to later." ~ Epictetus