Similar to a fool's gold.
I always thought that the Bitcoin halving will make the value of Bitcoin to jump instantly right after its completed, I remember staring at the count down some years ago only to be disappointed.
This affected my mentality about Bitcoin, as I was still lost and lacked knowledge about about how Bitcoin really works.
This made me to sold my coins at the time only to see a bull market starting after few months, a painful experience that I can never forget, I sold coins for $3000 that later turned to $90,000, I sold some early around $1,500 - $2000 and later they made a new highs around the minimal of $20,000 and higher.
The most painful one was a coin I held and later sold for $600 and it killed 3 zeros later, turning the amount I sold into $100k, I have lost so many opportunities just because I have no patience and I also lack the knowledge.