Yes, It would be great if every crypto investor has an optimistic attitude towards the crypto market. However in reality, not many of them can be optimistic all the time...If they are not optimistic enough, they will simply sell all their holdings when a bearish market comes.
This is a must attitude that we have especially when the market is down. We should not be afraid on holding good coins because in the long run, everything will be alright and people should focus on their long term goal, don't just invest on shit coins, look for good coins that can survive during bear market.