With inflation, coins with a higher metal value began to have a nominal value lower than the value of the metal they were made with, causing people to start melting these coins to obtain the metal. Thus, bad coins ended up dominating the market, and good coins disappeared.
It seems to me that you have not understood it well. Where did you get that from?
Could something like this happen to Bitcoin?
I myself have cited this law to defend that I do not believe that bitcoin will become a widespread means of payment, technical problems aside, because if you have a thousand ways to pay with fiat, which is inflationary, and shitcoins, that tend to go to 0, what sense does it make to pay with bitcoin?
In other words, are people starting to want to save their BTC coins so much that their value is lost?
Same as before, I think it's something you've misunderstood.