What's something you learned after years of investing but

But you can summaries in one or two line Ig for me was 1) don't sell your shares when u require small amount of cash Like I sold many shares for small profit (30 to 50%) And later they were 300% 2) don't do fno Nirmala tai hi winner he usme 3) don't too diversify 4) ipo me apply karo (earned 40k usise)