Silver has plenty of industrial uses. Very little has changed in industry to cause demand or supply shifts to match the massive price swings. Thus a lot of this is probably meme investors gambling
Fun fact about silver, besides its heavy industrial footprint, which you mentioned: the supply is dominated by Mexico. There have been some, uh, erratic words about Mexico from the people in the position to affect trade policy and foreign policy.
About one third of this demand (photographic film and paper) more or less evaporated in the 2000s. You don't see that on the price chart, so I don't think you can seriously argue that the price is dictated by industrial uses.
I would say that the late 1970s reflexive silver bubble revealed magical thinking about silver which isn’t common with fiat. We know that big names rode the bubble on the way up, and made more on the way down. I think we can talk about meme pricing in the same way.
There's debt in dollars and euros, so people actually need to obtain dollars, euros etc. to avoid losing their collateral.
That isn't the case with silver or gold, for the most part, and what are you really going to use them for, now that there are so many excellent rust-resistant alloys?