What if I launch a cosmetic brand completely associated with crypto in some way. Like , the purchase of cosmetic products of my company being available only with certain alt coin.
That would be a fantastic idea, at least it will bring the payment methods of cryptocurrency into the cosmetic world, though I believe some cosmetic agents must also have their payment platform that have brought in cryptocurrency, but if you are having this inborn idea within you to launch yours, I will advise you give it to trial. You can make use of any altcoin of your choice that you feel is reliable, as long as it makes the idea come into fruition.
I disagree, this is a bad idea, how many people around the world have adopted at least one cryptocurrency? No one knows the number but this is probably less than 5%, and of those people how many people will hold the altcoin the OP wants to use as an exclusive payment option for their cosmetics and have a need for their product? Without a doubt an amount even lower than that, so when given the option any potential client which may be interested on buying their products will go somewhere else as they are not going to adopt an altcoin just to purchase something they need.