That's quite interesting challenge. Even if he has achieved the challenge within few days he'll loss it back which is the reality with dice. I haven't taken it a challenge, but used to spend lot time on dice with small bet amounts. There used to be gradual win and the wallet balance keeps increasing compared to the base amount.

Then begins the disaster, however you play you won't be getting wins for some time period, by that time the fund slowly gets decreased and at some point mind agonize to get back the loss. In the event of getting back the lost amount the bet value is increased leading to the end of the play in very few rounds.