Allocation upgrade

Users will have opportunity to increase their allocation by upgrading. Example: User spent 20 USDT and received an allocation of 250 $X. He has opportunity to earn higher allocation by taking risk. Chance of upgrade will be directly proportional to desired allocation. If user wants to increase their allocation to 500 $X by risking their entire allocation, chance of successful upgrade will be 50%. In case of successful upgrade, user receives $500X; in case of unsuccessful upgrade, the user's allocation is lost. It is not necessary to risk entire allocation; you can bet any amount of $X and any number of times.