Thats all because they didn't do good research, but Luna fall was pretty obv after bear market, but surely sometimes even after good research you can lose, just because you are not lucky enough and project isn't hyped well
that is correct.
And also as OP asked - teach me to invest in NFTs. I think only in school and college only teachers teach when you are out in professional world you are a self taught student - the more effort you put in - the more better the results are.