fun fact: my father-in-law owns some btc that I keep until the new trezors with bigger display are delivered. during the sept.15 drop he called me and said bitcoin is finished and asked me if I could sell his btc. I knew it was just drop, said "ok" but didn't sell his coins but instead bought back in and made some coins. he called right at the bottom.
i was a bit nervous because I had not done what he asked me to do. his btc went way up afterwards, so he wasn't mad at me. he called me up today when btc went below $8k and again asked me to sell because he thinks bitcoin is finished for good now/will go to zero.