Going for big hit on mines

So I’ve been going for a 200,000 multiplier on mines, I’ve hit one that was 175k multiplier that didn’t take but two weeks to hit, I’ve been going for this one about a month now throwing any kind of bonus play towards it. Started at .01 bet and planned to double it ever 70,000 attempts.. I’m at 140,000 total games and beginning to think I should draw the line at some point. What do you guys think??