Idea seems good but so far in 2018 MN coins have given negative returns. The passive income generated just puts a constant selling pressure on the coin. You might say this year bear market and hence price down but how will gamers react to this. They cant wait 1 year for price to go up when they have real bills to pay in fiat every month. Most upcoming gamers go from paycheck to paycheck everymonth. If price goes down they will get affected seriously. Thats the main disadvantage you have to think about.