> if a person doesn't have a decent amount of resilience, patience and the ability to deal with loss, they aren't going to have what it takes to be an investor

This is one of the reasons even at this mid age I have more equity than debt. Like my debt is 2% and 98% equity funds in the portfolio. I think unless one takes risk, there is harder to have any reward. Again those risks have to be cascaded, I have equity risk cascaded that not everything is extreme high risk but some are moderate, mid cap, small cap etc. 

Some day we are going to die and we don't take risk we remain on the shore. 

No risk, no reward.