- buy a miner is another way to "buy" bitcoin without the need to wire money to an exchange or any other
(not very transparent) actors that provide services to enter the btc world.
I prefer your analogy to DPoS's. You're selling electricity in exchange for hashing power, in exchange for shares, in exchange for bitcoin, which are priced in difficulty The counter party risk is much preferable to the exchanges right now, that's definitely true (I'm not as convinced about the MtGox doomsday predictions as some people, but they've definitely got medium-term problems to deal with)