At a Classic Fair Launch, the token is launched at a very low valuation to let the community pump up its price, with the intention of letting the market decide it's actual value. While this is a great idea, what usually happens in a Classic Fair Launch is that sniper bots and big whales control the whole Fair Launch. Sniper Bots can buy much faster than normal users and whales often over-spend on gas fees in order to "front-run" other buyers and buy first. The initial buying pressure results in a huge price spike, which attracts lots of retail investors. After the initial pump and retail investors jumping on board, sniper bots and whales sell their tokens and dump the price massively. In conclusion, not only you're losing money in a scenario like this, but also stressing to buy at the perfect time.