With a current circulating supply of 119,329,078 ETH [1] that’s a $21,479,234,040,000 market cap. Total USD money supply is $6,394,800,000,000 [2]. That seems like a ridiculous prediction to me.
The whole article talks about BTC and ETH like they’re a currency, but that’s not how the tax authority in my country (Canada) views them. And, having tried to buy an ENS domain, I can say that ETH sucks as a currency.
1. https://coinmarketcap.com/currencies/ethereum/
2. https://tradingeconomics.com/united-states/money-supply-m0