The ESPN Player Rater currently has him rated as the most valuable player in fantasy baseball this season. While that is not necessary a perfect metric it is a pretty good one. In any case, it's undeniable that Altuve is "coming up big in every way" for the Houston Astros. His performance this season has definitely put him on the MVP list.
On June 25th, Altuve almost hit for the cycle, but he tripped on his own helmet rounding second trying for his triple. He had to settle for just a single, a home run and two doubles in one game. He was a good sport about it and was already laughing it off when he went back on his belly to tag second.