The scenario Saylor presented is unrealistic in my view because if everyone copied his behavior bitcoin would crush fiat through the speculative attack.
Saif's take is unrealistic in the short term because people are not perfectly rational by default and will make mistakes for a long time before the usury dries up, but his theory is closer to reality in the long term (low time preference).
If your confidence rests on other people rather than your own understanding you'll be on an emotional rollercoaster.