You're playing for the ratchet effect. Have your chip stack go one way: up. Don't give it the chance to go down. A variant of the hit and run strategy. I see one big advantage for you in doing it this way, and that is psychological. Maybe you need to get a few wins, however small, under your belt in order to gain some confidence. If I'm running bad with a string of losses, I'll occasionally do this: just sit down, try to win even a nickel, then leave - FINALLY booking a win.
But it's not a good overall approach for all of the reasons stated above.
The fact that you almost doubled up in three hours doesn't mean much. Variance. Play that way for 300 or 3000 hours and tell us how you did.
I had a hot run in online Blackjack
- a game I KNOW is unbeatable. Using a variant of the Martingale progression, I run $150 up to over $1200 in a couple days. My logic told me "this can't be working," yet it was. I felt like I had a license to print money. But sure enough, a couple more days and I gave it all back. Variance. You will have your hot runs and your cold runs. But how does it work out in the long run? You will hit tables where you'll take a bad hit right away and never get even. And you'll be staying, according to your criterion, until you get even and up a little bit. You could lose a lot that way. Why not just learn and play good poker?