我特别喜欢在技术文章中画图，有两个原因：对作者而言，如果能用图表达思路，侧面说明是真的掌握了；对读者而言，图形也比一维的文字更容易理解、信息量更大，图形中可以增加联系、颜色、形状等多维度信息。
所以一方面要让自己真的掌握一个知识点，另一方面要锻炼自己的画图表达的能力，以画图来反向验证自己对知识的掌握。画图的一些心得，参考我以前写的文章：《技术配图的一些心得》。
至于我用的画图工具，现在如果是随手画的图，就用excalidraw；一些更为正式的图，就用Mac上的OmniGraffle，可以很方便得对齐、调整颜色、字号大小等等，大几百买断的单机单平台软件，但是超值。
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.
codedump的电报频道 from ar