Requirements: 10m, LEGIT dice cc and this guide.
How to do it?: Start with 10m in your inventory. Go to Legit dice cc area (example. Cora Dyce), and find a trusted host. Bet him/her 500k. If you win, repeat. If you lose, bet 1m. If you lose again, bet 2m, and so on... Risk should be small. You can also bet 250k at the beginning, if you want to make the risk less.
When you reach 20m, change that 250k bet to 500k, or 500k bet to 1m. Everytime you lose, double/1,5x your bet. It's very rare to lose all cash. At 40m cashpile, make your bet bigger. Every time your cashpile rises, you can bet more. This works approx for 9/10 ppl. You can stop in 200m, or you can just keep going, your choice.