Bitcoin Miners, Whales Sell Into Strength as BTC Tests New Highs — Volatility Ahead?

July 21, 2025 — Bitcoin’s climb to all-time highs may be encountering resistance as miners and whales begin offloading significant holdings, potentially signaling a short-term top.

BTC is currently trading at $117,300 as Asia begins the new week, slightly below last week’s record high of $123,000. Ethereum (ETH) continues to outperform, hovering around $3,831 — up 4% in the last 24 hours and 26% over the past seven days — as capital flows rotate toward higher-beta assets.

The CoinDesk 20 Index sits at 4,071.75, reflecting ongoing investor appetite across major tokens. However, new on-chain data from CryptoQuant suggests caution is warranted.

On July 15, Bitcoin exchange inflows surged to 81,000 BTC — the highest daily volume since February. This spike was driven by both whales and miners. Transfers of 100 BTC or more jumped from 13,000 BTC to 58,000 BTC, while miner outflows totaled 16,000 BTC, most of which went directly to exchanges.

Ethereum mirrored this trend, with 2 million ETH flowing into exchanges on July 16 — the highest daily total since February. ETH has rallied 131% since April, and some large holders appear to be realizing gains.

Miner balances have also dropped notably, with BTC held in miner wallets falling from 68,000 to 65,000 BTC since June 26, reinforcing the idea that miners are using this rally to secure profits.

Historically, such large inflows from whales and miners have preceded local tops or periods of heightened volatility. While price momentum remains intact, analysts suggest these signs warrant close monitoring.

Singapore-based market maker Enflux remains cautiously optimistic.

“Liquidity is still robust, and we’re watching for confirmation in perp open interest and altcoin order book depth,” the firm told CoinDesk. “If ETH dominance continues to climb, we expect mid-cap tailwinds to persist into next week.”

Meanwhile, altcoin inflows remain muted. Daily altcoin exchange transactions stand at just 31,000 — well below the 120,000 level seen during previous market peaks in March and December 2024. According to CryptoQuant, this could suggest that altcoin holders are showing stronger conviction, awaiting better risk-reward conditions, or are simply biding time for the next catalyst.

For now, BTC and ETH dominate the spotlight, but sidelined capital may re-enter quickly if conditions shift.

Market Snapshot:

• BTC: Trading at $117,100 after a brief selloff broke below key $118,000 support. Institutions were active earlier, but signs of exhaustion could point to a deeper retracement.
• ETH: Up 3.78% on the day, buoyed by institutional flows and altcoin rotation. Analysts warn that with $331 million in short positions, a squeeze could fuel further upside.
• Gold: Despite recent weakness, CIBC expects gold to average $3,600 in H2 2025, citing central bank demand, geopolitical uncertainty, and expected rate cuts as bullish drivers.