Crypto stocks tumble as deepening market rout dents bitcoin

** Cryptocurrency and blockchain-related stocks slide premarket as market rout worsens** Bitcoin , world's biggest cryptocurrency, falls 2.5% to $76,837, after hitting five-mth low. Ether down 4.5% to $1,503, an over two-year low** Futures pummeled on Mon as Trump tariffs hammer global financial markets, and investors shed risky assets, including cryptocurrencies** Crypto exchange Coinbase Global descends 7%, prominent bitcoin hoarder Strategy off 8% premarket ** Crypto miners drop: Riot Platforms ~9%, Mara Holdings 9%, Cleanspark 9%, Bit Digital 8%** ProShares Bitcoin Strategy ETF and iShares Bitcoin Trust ETF both losing 8% before the bell** BTC has fallen ~20% so far this year