The reason why I think crypto is the future is that as time goes on, people will care more about privacy, security, ownership, and cutting out the middleman. Also, vendors will not want to pay the 2.9% transaction fee to square, visa, or traditional merchants. Even though Visa and credit card transactions are quite fast, they are still not fast enough. Maybe Digibyte (DGB) can be a viable small transaction crypto, because it is so fast.
For big transactions, bitcoin is fine. Because if you’re going to buy a car or a house in bitcoin, you could wait a little bit for the transaction to process.
For cyber security and other future crypto technology innovations, Chainlink is interesting to me.
For programming on the blockchain, Ethereum is the one.