(Reuters) -Crypto heavyweight Coinbase said on Tuesday it has bought investment platform Echo in a nearly $375 million cash-and-stock deal, aiming to bring fundraising tools to its platform. Dealmaking within the digital assets industry has picked up pace this year as a crypto-friendly Trump administration encourages companies to expand their business in the U.S. Last week, cryptocurrency exchange Kraken unveiled a $100 million deal for futures exchange Small Exchange, paving the way to launch a fully U. ...