I can't fault that strategy. You are probably young, working full time, lots of cash flow, lots of years to ride the waves, and probably little interest in being a market geek.
And for me, I can't fault myself for bailing and missing a possible next run up. For me the pain missing an unexpected run up from here is exponentially far less than the pain of watching a meltdown that I felt was the more likely outcome. I'm probably older than you, work part-time, have enough, but don't ever want to be "Oh damn, didn't see that coming" back to work full-time.
To me I see a triple threat of caution: bad market fundamentals (interest rates, debt, etc), historically overvalued levels, and most importantly, technically blown momentum which as far as I'm concerned drives more rally bubbles than anything else. That's just a distasteful cocktail of not-good that I'll gladly avoid even if I'm completely wrong.