No, Germany didn't reinvest. It didn't invest, in the first place. This article just made it appear as if Germany committed a mistake, regretted about it, and is now trying to make up for it. That's oversimplification. That's not what happened. This article is a garbage. It appears written by a work-from-home poorly-paid content creator from a faraway country.

There was indeed some resistance coming from the German parliament at that time. A member even wrote to the chancellor himself that the decision to sell those coins was "not sensible" and "counterproductive". They should have been kept.