There is no one right answer to this question. It really depends upon your build plan, which also depends upon your player's position and archetype.
With that said, I can not think of a build plan that would only 2nd cap (61) your secondary attribute. I have done some build plans where I only 3rd capped it, but that was assuming I was going to be multi-training that attribute for 7 seasons, and that I only wanted it to be around 80. For almost every position / archetype, you will want to take your second attribute to the 4th / 5th cap at least, so I would suggest that you are not ready to switch yet.
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With all that said, Kop gave a great answer above. There is nothing wrong with alternating between your 2nd and 3rd attributes, which goes back to my original statement....there is no one right answer to this question.