Bitcoin-related ETFs are off to a blistering start this week, with trading volumes spiking across major funds as institutional investors pour back into the crypto market.

BlackRock’s iShares Bitcoin Trust (IBIT), Fidelity’s Wise Origin Bitcoin Fund (FBTC), and Ark Invest’s ARKB all posted higher-than-average volume early Monday as Bitcoin held above the $83,000 mark.

The surge comes amid growing confidence that the Federal Reserve will begin cutting interest rates by early summer. That optimism, combined with Bitcoin’s resilience in the $80K–$83K trading range, is drawing capital back into U.S.-regulated ETFs.

• IBIT and FBTC led Monday’s flows, each with more than $300 million in daily volume within the first two hours of trading.
• Analysts at Bloomberg Intelligence said IBIT “appears to be attracting long-term capital, not just day-traders.”
• ARKB also saw one of its busiest sessions in weeks, up over 40% compared to its 20-day average volume.

Spot Bitcoin ETFs have become a major bellwether for market momentum since the SEC approved them in January. Large inflows typically correspond with upward pressure on Bitcoin’s price—and that trend appears to be playing out again this week.

According to Glassnode, on-chain data shows a noticeable uptick in coins being moved into institutional-grade custody wallets, typically linked to ETF providers and prime brokers.

“ETF flow is the new market heartbeat,” said Markus Thielen, head of research at 10x Research. “You can now track bullish or bearish momentum in real-time just by watching these products.”

Historically, Monday has been a strong day for crypto inflows, especially after bullish weekend performance. With U.S. markets closed over the weekend, many large asset managers wait until Monday morning to execute new trades and rebalance positions.

That activity is now showing up in ETF volume—and it’s giving retail investors a clearer signal about institutional appetite.

Here’s what the early data shows:

• Combined ETF volume on April 21 is on pace to be one of the top five trading days since launch.
• Bitcoin dominance has increased slightly to 53.2%, suggesting altcoin traders are rotating into BTC.
• Total net inflows for the top 10 spot ETFs are expected to exceed $500 million by the close of trading.

Bitcoin is still facing technical resistance at the $84,000 level, and macro uncertainty—particularly around inflation and geopolitical tensions—could cause volatility.

But ETF strength suggests floor support is rising.

“If institutions continue buying like this,” said Katie Stockton of Fairlead Strategies, “we could see a test of the all-time high before the month ends.”

• Updated ETF inflow data after market close
• Tuesday’s U.S. PMI manufacturing index for macro sentiment clues
• Potential SEC updates on crypto custody rules for financial advisors