Bob wants to buy Ethereum. He only has Bitcoin. On an instant-access exchange, he will trade Bitcoin for Ethereum. He will provide the target address of his Ethereum wallet to receive the Ethereum he wants to purchase, and he will also provide a refund address for Bitcoin, most likely the address from which he will be sending his Bitcoin to the exchange. Once he will submit the order, Bob will be asked by the exchange to send the necessary amount of Bitcoin to an address. Once he will send this money and it is confirmed, the instant-access exchange will handle all the buy/sell operations on his behalf, and will send the Ethereum once the order has been fulfilled.
This is a more advanced topic for those who want to do what is called « day trading », i.e. those who plan to buy and sell on a daily basis as their main activity. Arbitraging is the process of leveraging price differences between exchanges to make a profit, by buying cryptocurrency cheap on a given exchange and selling it for a higher price on a different exchange.
Warning 2: this is serious. If you don’t believe me, just go on Reddit (r/Cryptocurrency) and look for posts of people who ask for help. There are some devastating stories out there which are all based on greed, credulity, inexperience and/or outright stupidity. You may become rich, but you may also lose everything. People are taking loans with high repayment rates to buy at peak price and will end up ruined. Young inexperienced people have burned their relatives’ lifetime savings, others have no money to pay their university tuition. Don’t be those guys.
The recent market turbulence from the coronavirus pandemic has reinforced the importance of this approach. The stock market has recently gone through each of the three possible stages: market in confirmed uptrend, uptrend under pressure and market in correction. To stay protected throughout these changes, follow the No. 1 rule of investing: Always cut your losses short. While you can't control what the stock market does, this basic rule lets you control how you react.
Before you start buying cryptocurrency, you must understand some concepts about investing. Remember, cryptocurrency markets are not regulated, so investor sentiment is aggravated by rumours, people spreading false information, « pump and dump » actions, « sell walls », FOMO (fear of missing out) and all sorts of manipulations including insider trading. Knowing these will hopefully help you rationalise your actions.
Traditional full-service stockbrokers do more than assist with the buying and selling of stocks or bonds. They often offer a wide array of services and products, including financial and retirement planning, investing and tax advice and regular portfolio updates. But they can charge substantial fees and transaction costs that can erode long-term investment gains.

Buy “the basket”: Can’t decide which of the companies in a particular industry will be the long-term winner? Buy ’em all! Buying a basket of stocks takes the pressure off picking “the one.” Having a stake in all the players that pass muster in your analysis means you won’t miss out if one takes off, and you can use gains from that winner to offset any losses. This strategy will also help you identify which company is “the one” so you can double down on your position if desired.

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