In general, best niches are those with greedy, scared or desperate buyers. Or even desperate and greedy buyers, like making money online
Greedy: Everything related to making money, fast, easy, no work, get rich while sleeping. Crypto is having a great run at the moment, stuff like Forex still works pretty well, too.
Scared: Preppers. The sky is falling, the government is controlled by aliens, the zombie apocalypse is coming: Be prepared, make you own food, build your own fortess and learn to survive.
Desperate: Everything women hate about themselves, even if you tell them everything is perfectly fine. Their weight, their skin, the size of their boobs, wrinkles, eye bags, narrow eyebrows, alleged hair loss, alleged nail fungus, cellulite...you can continue the list forever.
