I dont exactly know if this is a paradox but
imagine you have 5000$ in your bank account, and you cant withdraw them. but you can take some money from your wallet and do a coin flip. if your side wins you get the amount betted from your own bank, if you dont then your bank account's money increase ( which you still cant withdraw ) imagine if the bank takes 2.5% fee for every coin flip
are the chances of winning this higher or is it equally the same as just gambling