Bitcoin's recent rally might be facing a roadblock as BlackRock Bitcoin ETF, a key driver of the asset's growth, experiences a decline in investor interest. After 19 consecutive days of inflows, the ETF recorded a net outflow on June 10, signaling a potential downturn for BTC.

The BlackRock Bitcoin ETF had been leading the charge, with inflows worth almost $3 billion in recent weeks. However, Grayscale's GBTC ETF saw a higher outflow of $39.53 million, resulting in a total outflow surpassing inflows. This shift in sentiment could impact BTC's price, which has already seen a 2.63% decrease in the last 24 hours.

The total supply in profit has also dropped, according to Santiment, from 19.64 million to 18.54 million. If the price continues to decline, this supply will likely decrease further. However, this could also present a buying opportunity for market participants.

The Hodler Net Position Change indicator suggests that long-term holders are cashing out, with a reading of -107.211 BTC. This bearish signal could push BTC's price down to $65,000 unless accumulation increases.

In conclusion, the BlackRock Bitcoin ETF's decline in investor interest and the bearish indicators suggest a potential downturn for BTC's price. However, market participants should be cautious and consider multiple factors before making investment decisions.