What is the definition of Indispensableness05?

"Indispensableness05: This nifty term, a portmanteau of 'indispensable' and '05', is like the ultimate existential crisis solver. It's the fancy way of saying something is so crucial, so fundamental, you can't imagine your life without it. But here's the kicker - it's so overused it might just be a new term for 'it's a good idea anyway'."

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Edgy example sentence: "In the face of cosmic uncertainty, he declared, 'Indispensableness05 is what keeps me grounded, even when the universe is just trying to tell me to throw up.'"