Digging bitcoin is not too complicated, you just have the basic knowledge about cryptocurrency and most importantly you need to have big capital. The digging of bitcoins is getting harder because of the increasing number of diggers. The profit from it is not very high
Yes CPU wars and us programmers in the past could deliver systems without it and 20,000 miners
are doing the productive work of what ten home PC's could do !
I know this because i once wrote a honey-pot proxy server and during peeks it was serving up
a whopping million requests an hour for advert-click-bots with pre-cached HTTP responses and
most of them didn't know it.
HTTP requests would be about 400 bytes long and not 250 bytes as used in block-chain so take
it from a pro that the king has got no clothes on
They can scream about centralization in academia but today we have ten big mining pools doing
90% of all transactions and you wonder why we now have a monopoly ripping us off on fees.
See
https://blockchain.info/pools if you would like to question these numbers