Chris,
I guess risk tolerance and age play a factor. I have experienced enough bear markets to know that I simply do not have the personality to be too heavily concentrated in young, super fast growing stocks. I have felt fear more that once in my investing career so I will probably always have some cash and dividend payers. It helps me sleep better.
All that said, thankfully, I also know the exuberance of hitting a home run with a stock. If I can hit another one I want it to be in my ROTH (no taxes due when funds withdrawn)
If I were younger and still working I would probably be another story…
Kindest Regards,
Steve