It would be helpful if it were possible to check on personal stats tab how much satoshis have been wagered on the account so far.
If you've never claimed a bonus before you can see how much you have wagered on the site by going to the multiply tab. ~~
You won't be able to check your total wager by using this method if you are using Freebitco.in for more than 6 years. Because, the multiply BTC bonus system wasn't available there before 2017. This method is only effective if your Freebitco account has been created within last five years.