Cryptocurrency assets held by institutional managers rose for a fifth consecutive week, a sign that market participants had once again flipped bullish on Bitcoin (BTC) and the leading altcoins.  Investment flows into crypto products totaled $42 million in the week ending on Sept. 19, with Bitcoin funds seeing inflows of $15 million, according to digital asset manager CoinShares. That’s only the third time in 16 weeks that BTC investment products saw positive inflows. All major assets registered a weekly increase, with investors buying up $6.6 million worth of Ether (ETH) products and $3.7 million worth of multi-asset funds. Investors also allocated $4.8 million towards Solana (SOL), disregarding a denial-of-service disruption earlier this week as a result of network congestion.