Cryptocurrencies have had an incredible run over the past few months, but that's coming to an end as many altcoins are crashing this week. According to data provided by S&P Global Market Intelligence, Solana (CRYPTO: SOL) had dropped 14.5% over the past week as of 4 p.m. ET, Chainlink (CRYPTO: LINK) was down 15.9%, Sui (CRYPTO: SUI) had fallen 14.9%, and Cardano (CRYPTO: ADA) was down 17.4%. President Donald Trump said tariffs on imports from China, Canada, and Mexico could begin next week and more may be coming.