I said profitable, not 100% safe.
Yes I agreed. Actually if u put like 10-15 btc so you can handle 24-25x red, it's good not to try double your balance, but take like 20-30% profit of your deposit and be happy.
If you want to take 20-30% profit than bet on first and second dozen. That way you will have close to 30% odds to earn 30%. With martingale strategy it will be close to 20%. Martingale strategy is the worst strategy for players and the best strategy for casino - because people blindly believe in it and brings 10 BTC to casino. If this strategy would not be invested they won't do such a stupid thing.
Read my thread. I code various simulations. I can code this one to:
If you want to take 20-30% profit than bet on first and second dozen. That way you will have close to 30% odds to earn 30%. With martingale strategy it will be close to 20%.
To show you that martingale gives worse odds than putting everting on the table in one bet. But not today. Maybe tomorrow if you will remind me.