Bitcoin is similar to the Papua New Guinea shell money.
The Papua shell money has value because it is long and time consuming to make the necklaces from the shells. Due to that it is still used as money these days in same places.
Bitcoin has value because it require investment and lot of electricity to make new coins (and to validate all transactions) , and the bitcoin supply is very limited - there is a maximum number of coins.
The bitcoin unfit for transaction money - the transaction validation/database extremely energy intensive (this is what everyone call as mining) , and there is no central authority to increase/decrease the money in circulation if required.
Bitcoin supply is unlimited, anyone can start their own coin... its "network effect" that props it up, just like social netowrking went from xanga to livejournal to friendster to myspace and facebook... who knows if 10 years from now another coin takes the throne
Bitcoin specificially, well even then each coin is divisible by up to 8 decimal places, max of 21 million coins , you do the math
The fact that as bitcoin rises in value and hashing difficulty gets exponentially more difficult and it takes more energy to mine increasingly less coins does NOT add value, it is a net energy SINK and subtracts wealth from the system!
Bitcoin is a scam in this sense, imagine it taking 100 dollars to print one dollar bill!!!!!
A currency that requires more and more real energy/resources to be brought into existence when itself is neither an intrinsic storage of value nor has any instrinsic utility is bound to fail in the long term, it makes no sense from thermodynamic standpoint