you have a very good point here but at the same time Dimon is not some random employee of this bank, he is the freaking CEO of it and if his opinions is not at least semi official statements then i don't know what is.

as for the buys, i'd could have agreed with you if his statement was something like "investing in bitcoin is not a good idea. but he outright called bitcoin "fraud" and that makes his company's involvement in bitcoin in any form "participation in fraud".
so he has to decide, either he was bullshitting or his bank is involved in fraudulent activities.