Cosmic GDP has already crashed, as Peak Star was ~11 billion years ago.
According to Sobral et al's prediction, the future star production by mass will give only 5% of the stars in the universe today, "even if we wait forever." More theoretical predictions, such as this one, suggest that nebulae will run out of hydrogen on the order of 1013 years, while star formation will occasionally happen due to collision of brown dwarfs until somewhere on the order of 1014 years.
Of course, hydrogen itself may have a finite lifetime. The half-life of a proton is experimentally known to be longer than 1034 years, but it may still be quite finite.
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