For me nitrogen is the one of the finest to invest your bitcoin, it offers a lot of varieties in which you can have a lot of ways to earn your investments. Also its one of the most trusted out there.
Nitrogen doesn´t even offer the ability to invest in their bankroll.
I´m not sure if you understand what you are talking about here.
Operators like Nitrogensports or Primedice don´t allow people to participate
in the site´s bankroll. On the other hand operators like Crypto-Games or YOLODice
offer the option for user investment.
The latter are making use of this innovation that has arisen alongside with Bitcoin, while
the former operate more like traditional fiat casinos.