As much as most governments want to have everything under their control in the interest of its citizens, I think if they didn't take an interest in them around 2009 to be in the know... its difficult to really catch on now and impose regulatory frameworks on crypto users+gamblers when most of them have gotten used to not having them in the first place. Its pretty much self regulatory now, but they best they could start with is as all crypto service providers to register with them and show citizens the business is a registered and regulated one.
For some reason, I have big doubts about the fact that governments defend the interests of citizens
In all social and political formations, the authorities have always tried to solve one problem - the preservation of power. And democratic regimes are no exception.
Regarding regulations, there is only one problem for the authorities (as far as I know), cryptocurrency cannot be recognized as a casino chip reflecting fiat value, because cryptocurrency is not rigidly tied to fiat, unlike chips in real casinos. Therefore, there are problems with taxation of the turnover of these cryptocurrency chips. In all other respects, the authorities already have full control - everything that happens in the fiat part is fully regulated.