Took a while to build up to that. I’m on iOS which has less features than android, but I think the basics are the same. Sell your portfolio as often as you can - every half an hour. Eventually you end up getting more coins each time so you can open more levels and get more sats each time. I only play to open rows. Once I’ve done that, I quit and come back in half an hour. It takes around 12 times to get 500 sats, which is a duration of 6 hours, but I only play 2 minutes at a time.