Despite most governments do not recognize Bitcoin as a currency, all those restrictions and existing laws relating to online and mobile gambling apply to bitcoin gambling. If online gambling with fiat money is illegal in your jurisdiction, then it is also illegal with BTC.
No it's legal. Bitcoin is seen as a commodity not a currency/ There are very few laws or regulations about btc. This is exactly why we use btc.
It's decentralized and it can't be controlled by anyone.