回复：关于比特币的问题
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1-3： 要达到那种程度的匿名性，你需要通过 TOR 连接，0.2 版本将支持这一点，而它距离发布只有几周了。我会在那时发布 TOR 使用说明。
4： 版本 0.1.5：备份整个 %appdata%\\Bitcoin 目录。 版本 0.2：只备份 wallet.dat 即可。
5： 不。整个设计就是为了防止这种情况发生。
6： 那些币永远无法找回，流通总量会减少。由于有效流通量减少，剩余的币价值都会略微上升。这与政府印钞导致现有货币价值下降正好相反。
7： 目前是 29,296 个区块。流通量是区块数乘以 50，所以当前流通量是 1,464,800 bc。
如果你只有 24k 个区块，那一定是初始区块下载还没有完成。退出 bitcoin，然后重新启动。版本 0.2 的初始区块下载更好、更快。
8： 现在通常是几百个。现在很容易，但随着网络增长会变得更难。
9： 问得好，是 TCP。网站需要更新为 TCP 端口 8333。
端口转发是为了让其他节点能够连接到你，所以它能帮助你保持连接，因为你可以与更多节点连接。通过 IP 地址收款也需要它。
10： 不，其他节点不会接受那样的做法。
开源意味着任何人都可以独立审查代码。如果是闭源的，就没人能验证其安全性。我认为，对于这种性质的程序，开源是必不可少的。
11： 速度较慢的机器生成的币更少。这与 CPU 速度成正比。
12： 还会有更多。
13： 它使用一种名为 Berkeley DB 的事务数据库。系统崩溃时不会丢失数据。事务一收到就会立即写入数据库。
14： 目前，你只需将区块总数乘以 50。比特币网络已经运行了将近一年。设计和编码始于 2007 年。
英文原文
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1-3: For that level of anonymity you need to connect through TOR, which will be possible with version 0.2, which is only a few weeks away. I'll post TOR instructions at that time.
4: Version 0.1.5: backup the whole %appdata%\Bitcoin directory. Version 0.2: you can backup just wallet.dat.
5: Nope. The whole design is all about preventing that from working.
6: Those coins can never be recovered, and the total circulation is less. Since the effective circulation is reduced, all the remaining coins are worth slightly more. It's the opposite of when a government prints money and the value of existing money goes down.
7: It's currently 29,296 blocks. The circulation is the number of blocks times 50, so the current circulation is 1,464,800 bc.
If you only have 24k blocks, it must not have finished the initial block download. Exit bitcoin and start it again. Version 0.2 is better/faster at the initial block download.
8: Typically a few hundred right now. It's easy now but it'll get harder as the network grows.
9: Good question, it's TCP. The website needs to be updated to say TCP port 8333.
The port forwarding is so other nodes can connect to you, so it helps you stay connected because you are able to be connected with more nodes. You also need it to receive payments by IP address.
10: No, the other nodes won't accept that.
Being open source means anyone can independently review the code. If it was closed source, nobody could verify the security. I think it's essential for a program of this nature to be open source.
11: Slower machines produce fewer coins. It's proportional to CPU speed.
12: There are more coming.
13: It uses a transactional database called Berkeley DB. It will not lose data in a system crash. Transactions are written to the database immediately when they're received.
14: For now, you can just multiply the total blocks by 50. The Bitcoin network has been running for almost a year now. The design and coding started in 2007.