they will think they can buy cheap when the token is listed on exchange because most projects do dump in price when listed on exchange, but in the case of Dia it was different, immediately it hit the exchange price keeps shooting up high, I believe soon the price will go very high again.
It often happens nowadays, prices drop when listed on the exchange, but of course there are a number of differences. Because of this, missing opportunities were inevitable, so it didn't mean the choices they made were unwarranted, they mostly couldn't bear the risk.