Bitcoin (BTC) continued its sideways price action as buyers successfully defended the $55,724 support this week. Large fund managers have used the period of consolidation to add spot Bitcoin exchange-traded funds (ETFs) to their portfolios. According to an analysis by CoinShares Research, Goldman Sachs bought $419 million, Capula Management acquired $470 million, and Avenir Tech purchased $388 million worth of Bitcoin ETFs since March. A report published by cryptocurrency exchange Coinbase shows that institutional investors labeled as investment advisers increased their Bitcoin ETF holdings by…