Buying pre-sale coins is done during an ICO (Initial Coin Offering). ICOs are a type of crowdfunding campaign to provide capital for the start of a new cryptocurrency project. In these campaigns, people or investors who believe in the project support the project developers by purchasing the project's cryptocurrency.

ICOs are usually carried out in several stages. First of all, the project is introduced and information about the project is given. Then, for a certain period of time, investors can pre-purchase the project cryptocurrency. This pre-sale phase is usually lower priced, and investors use these pre-purchased cryptocurrencies to make a profit later on the project cryptocurrency because they believe the project will be successful.

To receive presale coins, you must first choose an ICO project and register on the project's website. When signing up, you may be required to create a cryptocurrency wallet and deposit cryptocurrency into it. Next, you need to follow the specified steps to pre-purchase the project cryptocurrency. These steps usually involve simple operations such as submitting the cryptocurrency specified on the project website and specifying the amount you want to purchase in advance.

Making money by buying and selling crypto is done by buying crypto currencies on cryptocurrency exchanges and selling them at higher prices. To do this, you must first open a cryptocurrency exchange account and have enough cryptocurrency to trade on these exchanges. You can then make buying and selling transactions by following the movements of the market. However, remember that cryptocurrency trading is a very risky business and you can always experience losses. Therefore, it is important to trade using risk management strategies.