Well if you want to have stable income online like making business.You should try to create gambling website but it cost more money when you build it but if you stabilize this it will make a good return of your investment in the future or if you have skills like programming you can apply in freelance company.
You can create any time of websites, you don't need to only focus your attention on gambling websites. In my country I can't have a gambling website, it against the law. You can have or build your skills to gain knowledge in order to transform it into money, this world is going so fast and you always need to adapt and be creative.
but for me making of gambling website for now is a good choice specially for bitcoin user.In the long run gambling website can more profitable if you can manage this properly it will give you stable income and It will make you rich.Now for legality,thats not a problem you can use offshore hosting that will not get you caught.
for gambling website make a better odds so that costumer will comeback always on your site.