I think it will be exactly the opposite. A lot of folks will probably stick closer to home and a great many are going to lose the income they were counting on to set themselves up for cruising, in the new economy. I believe the regulations in most countries will tighten up and cruising as we knew it is probably gone forever. Cruising permits will surely be more restrictive and expensive. This will also dissuade a lot of folks.
Boats will probably be much cheaper, but the things most folks add to them to go cruising will not.
As for making money while cruising, this is a myth for the most part. The vicarious internet video businesses will probably fade away, and most really didn't make their producers enough money to cruise on, anyway. It will be even harder to work outside your home country in the post pandemic world as countries concentrate on getting their own people back to work and getting their economies going again. Work permits will surely be more expensive and harder to get.
Chartering to make money, which was difficult before the pandemic, will be a great deal harder after it. Few will have the disposable income for vacations for quite some time and if folks can afford them, they will likely be leaner and closer to home.
I don't think of myself as a pessimist, but I can't see a return to normality as possible. Nor do I think it an especially good thing.
The human race has a once in history chance to change the things that need changing. A reboot, if you will. Going back to the same old, same old is insane. Perhaps insuring that all the people of the world have shelter, food, clean water, health care and switching to renewable energy could become the focus of human existence, rather than the me, me, me of the pre-pandemic world? A world without war because those who would become radicals will have those things I mentioned above instead of the dismal, hopeless future that facilitates radicalism.
Interesting proposition, don't you think?
... I need a week sleeping in a different cove each night.... 
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