RE:Tin shortage to last for another 7 yearstin will be at 250k/metric ton in 3 or 4 years, you haven't seen jack yet
The number of semiconductor fabs that will be built in the next decade are going to create an insane demand for Tin. Every single chip needs to be soldered and tin is the only metal for the job.
The first of these fabs will come online in 15 months. They have been feverishly adding additional capacity to existing fabs since the chip shortage began, this is why the demand for tin keeps ramping. Wait until entire fabs start coming online left and right.