Re: what about privacy? if all transactions are public, you can easily trace account
Our company has bought 180,000 BTC. Please identify it on the blockchain, everything is public so it should be easy. 
Most merchants (even fiat) give customers a unique order number right? Nobody goes "OMG Amazon gives every single order a unique number. How do they manage it all". With Bitcoin it isn't any harder to give customers a unique deposit address as well.
Most merchants (even fiat) give customers a unique order number right? Nobody goes "OMG Amazon gives every single order a unique number. How do they manage it all". With Bitcoin it isn't any harder to give customers a unique deposit address as well.
although i don't have the computing capacity
if every transaction ever made is stored in those blocks in a .dat file
then a sufficiently powerful computer with enough time can draw a picture and determine which address has how many bitcoin, and continually update that picture as soon as the next block in, so only ~10 minutes late.
although that won't identify who owns the address, but at least one would be able to see, oh that address has 180,000 BTC. so that address might be your company.