I have seen so many things skyrocket in value over the past year, from Pokeman cards to classics cars to houses, cryptocurrencies, tech stocks and on and on. So

I have seen so many things skyrocket in value over the past year, from Pokeman cards to classics cars to houses, cryptocurrencies, tech stocks and on and on. Some of these are assets and some are collectibles and some are consumables. But none of it seems to be driven by general inflation. Have we seen this kind of scenario in economics before? Is this a known phenomenon? I don't know jack about economics, but to be perfectly honest it's making me very anxious - not because of the high prices, but because I know moments of exuberance are often paid for in the not too distant future.