I am personally amazed at how much the author of bitcoin got right, he is clearly a genius.
However, bitcoin is not perfect, interestingly, it seems as though bitcoin's creator did not predict the rise of mining pools. They could eventually exert the same amount of influence over the bitcoin economy as banks do today with government backed money.
There are other technical issues which could relatively easily be fixed in the code but would require a "hardfork", a change in the protocol meaning that either all nodes upgrade to the new protocol, or a new blockchain is started.
However, bitcoin is not perfect, interestingly, it seems as though bitcoin's creator did not predict the rise of mining pools. They could eventually exert the same amount of influence over the bitcoin economy as banks do today with government backed money.
There are other technical issues which could relatively easily be fixed in the code but would require a "hardfork", a change in the protocol meaning that either all nodes upgrade to the new protocol, or a new blockchain is started.
https://en.bitcoin.it/wiki/Hardfork_Wishlist