A slew of altcoins - a catch-all for most cryptocurrencies except bitcoin and ether - have been harpooned in lawsuits filed by U.S. regulators against exchanges Binance and Coinbase last week, hammering the prices of the tokens. Over 50 cryptocurrencies worth over $100 billion in total and making up about 10% of the overall market, are now viewed by the SEC watchdog as securities, according to CCData. Whether U.S. courts accept the SEC's classification remains to be seen, but the impacts are already being felt - Robinhood Markets has already said it will remove solana, cardano and polygon from its platform.