The Stellar Wheel will be available once per week if you deposit a minimum required amount. Please check the requirements here
Under paragraph 7. What are the different benefits of the mBit Stellar Club? navigate to 7.4. Weekly Offer
You will find the deposit requirements for each level.
If your account qualifies, you will be able to spin the Stellar wheel every week. It will be available Monday starting 7 AM UTC, to spin between Monday and Wednesday - and get a chance for more Free Spins, depending on your Level!
Here are the levels and their corresponding deposit requirements:
Level 2 - Space Lieutenant: 50 USDT or equivalent in crypto;
Level 3 - Space Captain: 75 USDT or equivalent in crypto;
Level 4 - Space Major: 100 USDT or equivalent in crypto;
Level 5 - Space Colonel: 150 USDT or equivalent in crypto;
Level 6 - Space Brigadier: 200 USDT or equivalent in crypto;
Level 7 - Space General: 200 USDT or equivalent in crypto.
Keep in mind also that the cryptocurrency prices are volatile due to their high fluctuations.