Few years back, I could remember Cryptocurrency wasn't really known by most people and the idea was joked with, even I myself didn't have a thought on it, but the growth of crypto is now alarming that almost all my friends are into one or two of it.
It is alarming in a positive manner.
People are noticing the growth of cryptocurrencies because they just can't ignore it. There's an opportunity on it and they can be part of it and use that opportunity for them to make money.
It will also force them to become investors although they are not by buying and holding, they already are.
Looking into the future I suggest Cryptocurrency will suspend other past used currencies and take over, what do you think?
The sudden decrease of cryptocurrencies will happen, only the best will remain and taking over fiat currencies, if that's what you are describing can happen slowly.