Two things you can count on;
1. Egypt ceases to be a tourist destination.
2. Oil futures will skyrocket regardless of the Suez status.
BTW, the canal is pretty narrow and could easily be blocked.
Forget about the Suez Canal. The majority of East-West trade doesn’t pass through it anyway. Oil, Minerals, Grains between the USA, South America and Asia use much larger Cape-size vessel that go around Africa. The Suez is primarily for Mid-East trade.
Let the Egyptians block it. They seem to do so every 20-30 years anyway. Yes, we will all see alarmist headlines and price spikes for a short time, but in 6 months no one will care, and it will only prove how feckless and weak the Arabs are.