A bottle is more scent than you will wear
A 100mL bottle is roughly 250 wearings of one fragrance. Wear it twice a week and that is well over two years of the same scent. Most people move on long before then, and the rest sits there turning.
Fragrance IQAUTHENTIC DECANTSA 100mL bottle is about 250 wearings of one fragrance. Ask yourself honestly how many you have ever reached on a single scent. That gap, not the price tag, is what a decant actually fixes.
A 100mL bottle is roughly 250 wearings of one fragrance. Wear it twice a week and that is well over two years of the same scent. Most people move on long before then, and the rest sits there turning.
Once a bottle is open and half air, oxidation starts changing what is left. The top notes go first. The scent you paid for is not quite the scent still on the shelf two years later.
Thirty seconds on a paper strip at a counter is not how you learn whether you want to smell like something every day. A 10mL costs you a coffee run to find out. A bottle costs you a few hundred and a shelf ornament.
We are not going to pretend otherwise. Buy 100mL and you pay less per millilitre than you do for 30mL. That is how buying in bulk has always worked.
It stops being a saving the moment you do not finish it. Bulk is cheaper per unit right up until you throw most of it away, and a fragrance you wore for four months and moved on from is mostly thrown away.
Same authorised juice, poured from a sealed bottle, poured from a factory-sealed bottle. The difference is that you buy the amount you will actually wear, and you can own three of them instead of committing everything to one guess.

Build a rotation of three and take 5% off the set. Or take the quiz and let it pick your first three.