#方法论
写技术博客时，我很喜欢画图来表达原理。也因为自己画的图多了，有了一层感悟：但凡能把技术原理通过画图清晰表达出来的，一般文章内容也不会太差。这是因为，画图不同于文字和简单的贴代码，是经过作者理解了原理再翻译成图形语言的。
按照这个推论，得到一个搜索优质技术文章的技巧：使用Google搜索技术文章时，以前是根据关键字搜索相信搜索引擎的排名，现在可以试一下切换到Google搜索中“图片”那一栏看看。图片这一栏可以在不用点击文章的情况下马上看到文章中的一些缩略图，根据画的缩略图能大体判断文章的质量。
BY codedump的电报频道
Most people buy Bitcoin via exchanges, such as Coinbase. Exchanges allow you to buy, sell and hold cryptocurrency, and setting up an account is similar to opening a brokerage account—you’ll need to verify your identity and provide some kind of funding source, such as a bank account or debit card. Major exchanges include Coinbase, Kraken, and Gemini. You can also buy Bitcoin at a broker like Robinhood. Regardless of where you buy your Bitcoin, you’ll need a digital wallet in which to store it. This might be what’s called a hot wallet or a cold wallet. A hot wallet (also called an online wallet) is stored by an exchange or a provider in the cloud. Providers of online wallets include Exodus, Electrum and Mycelium. A cold wallet (or mobile wallet) is an offline device used to store Bitcoin and is not connected to the Internet. Some mobile wallet options include Trezor and Ledger.
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