Gambling itself is illegal per se, so any form of gambling which includes bitcoin gambling or gambling your immovable properties are all llegal but the punishements are usually a slap on the wrist.

Of course it is legal in certain states where you can gamble in registered casinos etc.

But generally if you are into gambling it is a safe idea to keep it silent rather than let the whole world know you are gambling.

Personally  I would never advice gambling, it costs far more than what you will stand to make as a profit and there are literally a million other avenues to make good money with only a fraction of the risk.