In terms of electron charges, $e^-$, one coulomb is the combined charge of $6.24 \times 10^{18}$ electrons. That’s 6.24 billion billion $e^-$’s.

That is a lot of electrons moving when the current is an ampere. So it’s no wonder when we deal with everyday currents we don’t count grains of sand, but instead talk about current in amperes and charge in coulombs.