回复：关于地址的问题
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端口转发会把一个端口转发到一台计算机。它告诉路由器哪台计算机处理该端口的连接。所以那就是接收端计算机。
如果你没有设置端口转发，传入连接就不会到达任何计算机，向该 IP 发送时只会显示无法连接到收款方，也不会发送任何东西。通过 IP 发送时，你仍然是向一个比特币地址发送，但你的计算机会连接该 IP，从那里获取一个新的比特币地址，把交易直接交给对方，并确认交易已收到且被接受。
应该有人公布自己的静态 IP，这样大家可以试着通过 IP 发送，也可以给那位用户一些免费的钱。
比特币地址中有一个 32 位校验和，因此你不会意外输入一个无效地址。
如果 4) 你发送给的收款方放弃了或丢失了自己的 wallet.dat，那么这笔钱就丢失了。可以提出一个微妙的观点：由于流通中的货币总量因此减少，其他所有剩余货币的价值都会略微上升，也就是“自然通缩”。
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Port forwarding forwards a port to one computer. It tells the router which computer handles connections to that port. So that's the computer receiving.
If you didn't set up port forwarding, then incoming connections won't go to any computer, and attempts to send to that IP would just say it couldn't connect to the recipient and nothing is sent. When sending by IP, you still send to a bitcoin address, but your computer connects to that IP, gets a new bitcoin address from it, gives the transaction directly to the them and confirms that it was received and accepted.
Someone should post their static IP so people can try out sending by IP and also give that user free money.
There's a 32-bit checksum in bitcoin addresses so you can't accidentally type an invalid address.
If 4) you send to a recipient who has abandoned or lost their wallet.dat, then the money is lost. A subtle point can be made that since there is then less total money in circulation, everyone's remaining money is worth slightly more, aka "natural deflation".