It's usually better to buy the coin before the burning since burning is done in the first place to reduce the supply so that the price of the token/coin itself would rise up
This is not the case of shitcoins.
I just wonder why they need to have big supply and then burning it when they one first hand itself, can create a coin/token with less supply?
Burning is for deceiving and definitely not a progressive related action for a development of a coin/token.Reducing the supply alone will not guarantee growth of a coin. Swapping/burning are few latest traps, devs have these days to lure naive investors. Never fall for these.
You obviously also think that the fork London, which occurred in Ethereum on August 4, is also a deception? One of the innovations of this fork is the burning of part of the commissions in the Ethereum network. Despite the fact that initially the burning of coins was not provided for in the Ethereum technical document, the team decided to burn some of the coins, which should definitely affect the price increase.