One share of the Blackrock BTC ETF is $50. Far more people will invest in the BTC ETF than will ever buy Bitcoin.The price of entry is currently $0.0009. Bitcoin can be transacted in fractions as small as 0.00000001. The base unit of bitcoin is a satoshi (often abbreviated “sat”), and there are 100 million sats per bitcoin (same concept as 100 pennies in a dollar).