How many here have said "I quit", especially in the early stages. Then you cooled off, and came back, and kept at it.
I'd keep at it if you're trading prop (unless you're in a huge hole and you aren't receiving any income). If you're trading your own funds and have wiped yourself out, then maybe you should seek another career path. Ultimately, it's an individual decision. Trading is not for everyone and today's market is extremely tough on newbies and veterans alike.