Monaco and France have added Canada and the USA to the list of Green zone countries, meaning that fully vaccinated* travelers 12 yrs of age and older from the USA and Canada will be permitted to travel to France and Monaco with proof of full vaccination. No further tests are needed.
The citizens of Monaco are forbidden to enter the gaming rooms of the casino. The rule banning all Monegasques from gambling or working at the casino was an initiative of Princess Caroline, the de facto regent of Monaco, who amended the rules on moral grounds.
If you plan to visit the U.S., you do not need to be tested or vaccinated for COVID-19. U.S. citizens going abroad, check with the Department of State for travel advisories.
But even if you're not a high roller, Monaco isn't cheap. You're going to need some cash to make the most of it. ATMs are a handy way to withdraw local currency while you're in Monaco, as long as you avoid common pitfalls and unnecessary fees. Here's all you need to know about ATMs in Monaco.
When visiting Monaco, there is no passport control except of when coming from a Schengen country. Visitors were previously able to get souvenir passport stamps at a state tourism office. Official passports are no longer stamped as this may cause difficulties with validity.