Well, I'm playing on mobile (not sure if that's what you're referring to)... I'm at 3.7M and have been constantly playing Rio (20k entry) for over a month. I usually set a milestone amount to save up to before I up the ante. I think I saved to 1M before playing constantly in Rio.
I usually only play under Sponsorship periods, and like the 1-hole, quick matches to get in as many apparel packs as possible. I also like the 20k ante amount... enough to mater, not enough to hurt in a loss.
I have played a handful of higher matches, with about 5 in Tokyo (250k) and loss 2 of the 5. I fear getting in a rut and loosing a huge chunk of the stash.. which as you know is such a grind to build up. It's a somewhat conservative mindset. I was wondering if most others have that conservative approach and assume they do...