I'm not a huge fan of crypto because I think the banking cabal could easily take them over and use them as a control method.
But the reason they fluctuate is because they are being used as a commodity and not a currency. If they started getting bused as a currency instead you would see a more stable volatility like the dollar when we weren't hyper inflating it.
People are only speculating on the future use of these cryptos as currencies.
I think there are many, many more uses to crypto other than as currency. There are countless practical uses for secure, decentralized networks.
I view this as a nascent industry where the peer to peer networks are being built out. By buying tokens now, you are incentivizing the networks to be built and maintained. Once the network is established, the currency / token / network , will become more stable and less volatile and therefore more widely adopted. As its more widely adopted the demand becomes more and the original holders, or investors if you will, will be rewarded.