You know you've got too many gift cards if merely entering its code & pin code becomes repetitive. For context: I took part in a survey. At the end, we had to guess how many respondents there would be. Whoever got the closest, won the gift cards (5 x 50 EUR). There were 1510 respondents, I guessed 1505!
I hope whatever you choose to do next goes fantastic and maybe you can return at another point!