Basically we used a shitton of it due to the United states being dumb by pricing it low. Now scientists are pissed off because there are only a few ways to get it on Earth.
However there is a solution to this, Helium 3 and THE MOON!!! Yep... we are going to need to colonize the Moon within 30 years! Yay for that, boo for Helium shortage, tell you party balloon guys to stop wasting it so scientists that actually need it can use it!