Gambling has been around for eons, but the first legal casino was opened in 1638 in Venice, Italy. Online gambling started gaining traction in the 1990s. Today, the legal online gambling industry is massive and growing fast. The value of online wagers is expected to exceed $1 trillion by the end of 2021, according to Juniper Research. It’s even more impressive when you consider the numerous legal restrictions with which it contends.Â