Tell me how to quantify the privacy of a LN tx.

Lol no but thanks for the advice 👍

LOL

I don't think the fiat value of XMR is particularly important because as I see it, XMR is a transactional currency, and not a good store of value with the goal of appreciation. When you have a transaction that you want extra privacy for, you convert bitcoin into the amount you need in the moment, and use the exchanged XMR for your planned transaction. In this perspective, the fiat value of XMR is largely irrelevant. That's just my two sats.

Does this affects the usability, fungibility and privacy of monero?

Why not use DOGE then? More inflation, less privacy and even a better store of value than Bitcoin. Look at the chart (denominated in USD). It tells you that DOGE is objectively a better store of value than Bitcoin! See how useless those charts are in an adversarial environment. Educate those who understand this and make the coins fittest for currency be adopted for goods and services whatever the price in fiat. It's just fiat cantillionaires and Paolo coin playing the masses.

once Monero is delisted from everywhere I'm sure it will be forgotten. why is it being delisted again?