I'm an old player too. 50.

There's only a possibility of losing your whole roll at cash games if you play waay over your head.
I tried both, today I despise cash games. IMO they're a lot more "grindy", as there's never a posibility of a big score. On a good day you'll win a few BIs, a bad you lose a few.

Oh, and with $77 you shouldn't even be playing .03/.05