I doubt crypto banks will spread that quickly, and the pace will be very different between different parts of the world. But the article in the original post makes some really good points, and I definitely think that demand for crypto services in banks is rising in spite of the hype for DeFi. This part of the article highlights this well:
"There is, however, one fundamental problem with all of this. The average banking customer isn’t going to engage with decentralized finance protocols for decades. Yes, the most avid crypto enthusiast knows enough to dig up the contract address of an ERC-20 token, trade it on decentralized exchanges, and invest that token through lending platforms and liquidity pools.
However, the average person is likely still going to want to talk to a banker from time to time, even if they hold most of their wealth in the form of cryptocurrency."