Stock prices are also hampered by the growing attractiveness of fixed income reteurns.
The coin has seemingly stopped its advance.
The Nasdaq 100 offered the second biggest return in Bloomberg's ranking, at 19% year-to-date.
Digital tokens, just like other riskier assets, have sold off in a risk-off environment.
"They have hardly gotten anything right since Alan Greenspan first arrived," Grantham said of the Fed.
The past two years haven't been kind to ARKK and other products in the Wood universe of funds.
The Princeton University economist also said there is no chance the Fed raises its inflation target.
The ETF has fallen 26% over the past year and has seen minimal inflows during its lifetime.
Even as volatility has receded, liquidity has not returned to crypto markets.
Passive strategies have been gaining market share for years thanks to characteristics like lower management fees.