The nine recently approved spot bitcoin exchange-traded funds in the United States are on track to surpass the Grayscale Bitcoin Trust's BTC holdings today.

According to K33 Research senior analyst Vetle Lunde, GBTC held 400,186 bitcoins as of yesterday, while the "newborn nine" U.S. spot bitcoin ETFs held 397,847 coins.

They also noted that yesterday's net inflow was 6,965 bitcoins. If this continues, they will outgrow GBTC.

Spot bitcoin ETFs have proven to be a major success in the U.S., with BlackRock's IBIT offering hitting a record daily inflow of $788.3 million on Tuesday — when the combined spot ETFs generated nearly $10 billion of trading volume on the day.

IBIT has also recently surpassed MicroStrategy's bitcoin holdings, according to BitMEX Research.

At the same time, …