If any of you could predict the future looking at the time series of stocks, you would be a billionaire.
Let's stay focused on what is the realistic scenario for diving in the next 12-18 months.
I would not bet on people flying or traveling to other countries. Instead I see the possibility of the resurrection of the way we were diving in the seventies.
Only local, at distances reachable by car.
Only autonomous, no diving center or divemasters.
Your own inflatable Zodiac, or perhaps you rent a small boat at the port.
Equipment purchased online. Bad time for physical shops.
Tanks filled at home with your own compressor, or at filling stations located outdoor, at gasoline stations or in the port.
This was how I started diving in the seventies, and all of this is already feasible now, or in 2-3 weeks.
This summer I do not see alternatives.
I fear it will stay the same also for summer 2021, although I would be very happy to be wrong, and that the next year more organized scuba activities will become possible again.