Cramer says Robinhood is a dogecoin gateway, knocks firm for warning about September slowdown

Vlad Tenev and Baiju Bhatt attend Robinhood Markets IPO Listing Day on July 29, 2021 in New York City.
Cindy Ord | Getty Images

Robinhood's financials are too narrowly reliant on dogecoin trading, according to CNBC's Jim Cramer.