https://www.reuters.com/article/fintech-crypto-bitcoin/first-u-s-futures-based-bitcoin-etf-begins-trading-bitcoin-nears-record-idUSKBN2H90JX >NEW YORK/LONDON (Reuters) -The first U.S. bitcoin futures-based exchange-traded fund began trading on Tuesday, sending bitcoin to a six-month high and within striking distance of its all-time peak, as traders bet the ETF could boost investment flows into cryptocurrencies.