If someone has relative cheap electricity, he can be sure to get comparative advantage as long as bitcoin use PoW.

The variable of block reward time make mining pools economical. small percentage of hashpower won't get steady income when it mined solo.

So the mining itself can always leads to a bit centralize under current consensus, what ever PoW you switched to. It's not the right solution for central mining.

这样的期货没太大用处。

主要的原因是需要番羽土啬吧。

应该是已经结束一轮了。

对，就是要让早参加的人获益颇丰，这样才能不断吸引人加入。之后经过不断的涨跌，早期投机者获益退出，最终 Bitcoin 本身的流通价值才得到广泛认可，因此“挖币”的收益是和整体流通量匹配的。

早期的那么零头的奖励，就是因为流通尚且不充分，必需要引入一个奖励机制带来的。眼光要放长远一些，看着之后的交易吧。

just don't trust any FREE item.

FREE always costs.

consider it just a proof of work.

明显就是为了要赚钱。

据说是要回四个以上的帖子。

interested in ripple. i'll dig in further.