Its a huge ammount to put at bankrolls from casinos, even knowing they are profitable its a huge risk to make just those investment, with 100k i would make my own casino, soo the risk would be reduced to zero, and who knows maybe build an exchange, since this are the two places where are the most coins being spent.
maybe with 100k you could make new casinos but currently rivalry among gambling sites is very heavy and there are new gambling sites appears for each day which have unique promotions to get the players and i think build new casinos won't reduce the risk became zero and it would only increase new problems and the latest example is plenty online casinos are bankrupt because doesn't have the active players or less of popular