Every time I've bought a coin because I thought the person launching it had a big enough reputation that the coin would do well, and I feel like I got a good entry, it has been a flop. I feel like from first principles I know this is true but I still end up buying these for whatever reason

It's important to do thorough research and analysis before investing in any cryptocurrency, regardless of the reputation of the person launching it. Don't let hype or perceived reputation blind you to potential risks