This is a long term investment and commitment that you had to agree. Competitions are everywhere and obviously with the number of casinos that has different games and others that are focused solely with dice has also its competition but bustadice remains humble being part of the top dice sites.
Since the bustadice bankroll is massive, most investors will only get a small stake in the bankroll if they invest, and thus their ROI won't be insane. But, it's a worthy trade off, since they get top notch security and accountability from two of the most trusted names in the space. 100% worth it and the best option for investing imo.