不光你一个，大家都一样，我也是删除了以前的低质量文章，尝试发表高质量帖子，这段时间不断学习中，也就当个笔记本吧，权当自己的学习记录，那天有了merit也可以使惊喜，哈哈。

这几天听得最多的就是即将选择方向，然后按照传统分析的话，会有很多人从股市提了一部分钱，不知道币圈会不会有心的血液流入。

国内市场的比重真的低了很多。

嗯，拭目以待，不过每一次暴跌都是一个翻身的好机会。

嗯，也就是还没有抛出带血的筹码。

谢谢充值信仰！

近日很多人看空比特币有4000,3000还有2000的，有经历过以前大跌保暴涨的朋友能分享下当时的心理吗？

大家怎么看待？

焦虑来源于对现状不满和未来的不确定性。

对呀  说不定会来个小惊喜，看空的人太多了！

    Same feeling,  like 'solid project', and in some cases, like 'mate',  examples. ' Hi mate, you know...'. I don't know but it's quite weird for me.
and another one is ' innovative ', listened too many times.
And also there some phrases like "Paypal of China,  Google of India".
Will add some others when I recall.

It'senought.
Merit is trackable, so there is a high risk to buy it, the best way is to publish some useful info.
I was one of the ppl who always publish shit posts for airdrop or bounty program, after the new law, I have deleted all of them, just wanna learn the real blockchain technology, not all kind of tricks, so I'm starting blockchain online course, solidity programming etc. 
In general, what I mean is a new law is useful and effective.

About the numbers.
Actually, I think it's not the issues, number of the merit. for example, could be 1, 5 or 10, then what will happen in the future? every time when we have too many shit posts, we increase the number of merits, I don't think it's a solution.  So 1 merit is  enough,In my opinion, int BTT there are only 2 kind of ppl, with Merit and without merit, this means there are two different groups of people.  What BTT needs is a group of ppl who folow the rules and value their merit.
Thanks.

最近要有大假期了，很多人会不会拿着闲钱在家抄币呢 ，哈哈，10月小牛这个大家怎么看，毕竟比特币最近是怎么也打不下来的倔强劲儿，横盘了也是有些时日，纯粹的讨论，不作为任何投资建议。

9月26日，比特大陆向港交所提交上市招股书，打破之前IPO终止说法。比特大陆上市之路真所谓一波三折，最近的搜狗CEO王小川任独立非执行董事，更是让大家有了更多的想法，那么，我们想一下，比特大陆为什么会选择现在这个时候来上市？

我个人来看的话几个点，大家有什么想法可以一起分享，
0，去年的牛市，矿机厂商算是赚的盆满钵满，丰厚的收入有了，但是随着市场走熊，整体的经济也是走入了下行通道，谁都需要子弹储备，上市融资就是一条比较好的路。
1，比特币的减半周期只剩下不到300万个，很多厂商也是各种原因转型，比特大陆也算是芯片研制的公司，这些都需要高额的投资，研发支出，转型和支出迫使比特大陆融资来缓解。
2，从财报方面来看的话，去年的盈利记录还在范围内，亮眼，去年的牛市也可以帮助获取更大的市值，现在或许是上市的最后一班车，肯定不想错过。

大家觉得如何？  有想法一起讨论。

大实话，我的第一个赞就是在中文板块里拿的，新的规则我觉得挺好的，BTT大环境改善了不少。

刚好有时间，和大家一起整理下比特币的历史走势，大家有什么想法一起讨论哦！

比特币历史上的暴跌：
1.2011年从176元高点一路跌到14.01元。
2.2012年从103元暴跌至51.11元。
3.2013年4月从1944暴跌至300元。
4.2013年底从7995暴跌到2010元。
5.2015年12月从3350元暴跌至1858元。
6.2017年1月5日从8888元暴跌至5011元。
7.2017年5月25日那一周从19084元暴跌至12355元。
8.2017年8月17日那一周从30299元暴跌至25000元。
9.2017年8月31日那一周从32350元暴跌至22592元。
10.2017年9月8日那一周从29310元暴跌至22600元。
11.2017年11月9日那一周从49500元暴跌到36000元。
12.2017年12月12日那一周价格11万暴跌至最低6.6万。
13.进入2018年连续三周都在11万到8万之间波动，中旬一路阴跌至40000-50000左右

从比特币历史走势来看，比特币走势并非一直上涨，很多人看到目前的走势可能会灰心，但是，请记住一点，历史总会重演，任何投资商品都有他的经济规律和周期规律，黄金、股票、房地产也一样，高抛低吸永远是投资王道，而不是盲目的跟风杀涨追跌。

防患于未然！

 

What’s Pivot
Pivot is a community from China for cryptocurrency investors. Its Chinese version is well operated. We provide cryptocurrency markets, prices, and charts in real time of more than 1400 cryptocurrencies and the freshest blockchain news. We aim to help investors communicate more efficiently with each other and with startups in the blockchain industry.





Mission of Pivot community
The mission of Pivot Community is to empower blockchain investors through the community to not only avoid being shuffled by capital (financial shuffle), but also to discover quality projects; the community members can improve their awareness of the blockchain industry, collaborate within the community, and ultimately guide their investments and entrepreneurship.

Task of Pivot community
The primary task of the community is to screen valuable information. Everyone has the right to freedom of information release and effective questioning. Eliminating capital shuffling behavior is the basis for the empowerment by PVT Community. Therefore, PVT Community will not seek simple and crude growth but will work together with community members to initiate full discussions on new events. What PVT Community will do is completely free information sharing. PVT Community also provides a set of irreversible and permanent data storage mechanisms that leaves capital shufflers nowhere to hide.

The secondary task of the community is to help blockchain investors find quality projects. Excellent entrepreneurs are always scarce resources; excellent projects require excellent entrepreneurs and they also need excellent investors. The community allows entrepreneurs and investors to build consensus based on common values, perceptions and the blockchain, establish rules based on consensus, and generate new collaborations based on these rules.

Problems that blockchain investors are facing:
1.   Information Asymmetry
What matters is not the quantity, but the quality of information. People who publish and disseminate false information use human fears and greed to achieve personal benefits quickly through intensive capital leveraging; ultimately, ordinary investors are harmed, and the confidence of people in the blockchain industry is destroyed.

The basic method that PVT Community utilizes to solve this problem is to establish free disclosure of information and a backward tracing mechanism so that everyone can freely obtain sufficient information. PVT Community also empowers the creators of high-value content, allowing them to receive PVT token incentives from the output of professional insights; excellent community members can become KOLs.

2.   Decline in Quality Content
Content that is screened based on the mechanism of the number of likes is prone to decline quality, and the more members of the community there are, the more severe the decline. The reason why the community represented by Steemit is not successful is that the mechanism is an inflexible entity in contrast to human dynamics and pure technology cannot solve the problem of human motivation.

PVT Community realizes the emergence of quality content through the establishment of a personalized recommendation mechanism and the participation of community members, so that “good information can drive out bad information”. PVT Community will guard against any activity that seeks explosive community growth so that only the usage of PVT Community by the members can make it valuable, otherwise, all such growth will deviate from the mission of the community.

3.   High-quality Projects Are Difficult to Find and Difficult to Monitor
Community members can gather not only to find high-quality blockchain projects but also to promote project parties to make full disclosure of information and participate more closely in the projects.




PVT Community is a community in which the members can freely gather and form various collaborative groups. The value of the community is mainly reflected in the realization of information aggregation. In order to avoid compromising the gold standard of the community, PVT Community provides two separate sets of community member evaluation systems: Community Proof of Contribution and PVT.

Our solution
1、Technical Architecture
2、Value-based Content Evaluation and Incentive System
3、Decentralised Community Member Communication System
4、Rule-based Community Member Collaboration System
5、Personalised Recommendation System

Pivot in China
Pivot has received investment finance from Binance and other famous cryptocurrency funds. Up to now, nearly one hundred startups and hundreds of business leaders in the blockchain industry have opened official accounts in the Chinese version of Pivot. And more than 100k investors are using Pivot to guide their investments.

作为区块链，比特币社区的一员，不要变成被一夜爆富欲望驱使的投机者和一些连什么是梅克尔树都不懂的人。
学习更多的知识，只有这样，当下一次机会出现的时候，你才不会错过！

Merkle Tree，梅克尔树，又叫哈希树，在密码学及计算机科学中，哈希树（hash tree）是一种树形数据结构，每个叶节点均以数据块的哈希作为标签，而除了叶节点以外的节点则以其子节点标签的加密哈希作为标签 。哈希树能够高效、安全地验证大型数据结构的内容，是哈希链的推广形式[1]。

哈希树的概念由瑞夫·墨克于 1979 年申请专利，故亦称梅克尔树（Merkle tree）。

梅克尔树是区块链的重要数据结构， 其作用是快速归纳和校验区块数据的存在性和完整性。一般意义上来讲，它是哈希大量聚集数据“块”的一种方式，它依赖于将这些数据“块”分裂成较小单位的数据块，每一个bucket块仅包含几个数据“块”，然后取每个bucket单位数据块再次进行哈希，重复同样的过程，直至剩余的哈希总数仅变为1。


既然梅克尔树是存储hash值得一棵树，那我们先了解一下，什么是hash(哈希)

1、Hash

Hash是一个把任意长度的数据映射成固定长度数据的函数[2]。例如，对于数据完整性校验，最简单的方法是对整个数据做Hash运算得到固定长度的Hash值，然后把得到的Hash值公布在网上，这样用户下载到数据之后，对数据再次进行Hash运算，比较运算结果和网上公布的Hash值进行比较，如果两个Hash值相等，说明下载的数据没有损坏。可以这样做是因为输入数据的稍微改变就会引起Hash运算结果的面目全非，而且根据Hash值反推原始输入数据的特征是困难的。


2、Hash List

在点对点网络中作数据传输的时候，会同时从多个机器上下载数据，而且很多机器可以认为是不稳定或者不可信的。为了校验数据的完整性，更好的办法是把大的文件分割成小的数据块（例如，把分割成2K为单位的数据块）。这样的好处是，如果小块数据在传输过程中损坏了，那么只要重新下载这一快数据就行了，不用重新下载整个文件。

怎么确定小的数据块没有损坏哪？只需要为每个数据块做Hash。BT下载的时候，在下载到真正数据之前，我们会先下载一个Hash列表。那么问题又来了，怎么确定这个Hash列表本事是正确的哪？答案是把每个小块数据的Hash值拼到一起，然后对这个长字符串在作一次Hash运算，这样就得到Hash列表的根Hash(Top Hash or Root Hash)。下载数据的时候，首先从可信的数据源得到正确的根Hash，就可以用它来校验Hash列表了，然后通过校验后的Hash列表校验数据块。


3、 Merkle Tree

Merkle Tree可以看做Hash List的泛化（Hash List可以看作一种特殊的Merkle Tree，即树高为2的多叉Merkle Tree）。

在最底层，和哈希列表一样，我们把数据分成小的数据块，有相应地哈希和它对应。但是往上走，并不是直接去运算根哈希，而是把相邻的两个哈希合并成一个字符串，然后运算这个字符串的哈希，这样每两个哈希就结婚生子，得到了一个”子哈希“。如果最底层的哈希总数是单数，那到最后必然出现一个单身哈希，这种情况就直接对它进行哈希运算，所以也能得到它的子哈希。于是往上推，依然是一样的方式，可以得到数目更少的新一级哈希，最终必然形成一棵倒挂的树，到了树根的这个位置，这一代就剩下一个根哈希了，我们把它叫做 Merkle Root[3]。

在p2p网络下载网络之前，先从可信的源获得文件的Merkle Tree树根。一旦获得了树根，就可以从其他从不可信的源获取Merkle tree。通过可信的树根来检查接受到的Merkle Tree。如果Merkle Tree是损坏的或者虚假的，就从其他源获得另一个Merkle Tree，直到获得一个与可信树根匹配的Merkle Tree。

Merkle Tree和Hash List的主要区别是，可以直接下载并立即验证Merkle Tree的一个分支。因为可以将文件切分成小的数据块，这样如果有一块数据损坏，仅仅重新下载这个数据块就行了。如果文件非常大，那么Merkle tree和Hash list都很到，但是Merkle tree可以一次下载一个分支，然后立即验证这个分支，如果分支验证通过，就可以下载数据了。而Hash list只有下载整个hash list才能验证。

有想法，想必是过来人