Those who invested in bitcoin way back 2009 had not experienced any bull run before nor have much knowledge about the blockchain technology, yet they took the risk to invest. You and I have witnessed a bull run and heard about the numerous potentials of crypto so why do we still have to feel reluctant to invest in bitcoin. Let's be optimistic about our digital assets because its all we have.
Not everything can be resolved by just being optimistic about the future of bitcoin which is one of the most common things that I see posted in the forum, being positive is not going to give their money back to all of those that invested when bitcoin was very expensive, I agree that when you say the market has potential but in my opinion all of those that lost money have reasons to be negative.