Describing crypto transactions as fast and cheap? Yeah, incredibly realistic!
Bitcoin can only process 7 transactions per second globally. Ethereum 25. That is not fast. If you want to get an actual transfer cheapness goes out of the window. And it is not anonym either.
There are much faster cryptoasset networks, which I'm sure you already know, but the problem then becomes liquidity and volume required to not create slippage in the process.
Can you explain why you think it's realistic? Nothing they claim seems to hold much truth in-practice.
The idea that crypto solved "fast, global, cheap, secure, anonymized transfer of value" is not "realistic" - it's preposterous.
It's faster and cheaper than a bank transfer and receiving party can maintain anonymity, so yes it's realistic.