Yes, you can buy a Bitcoin coin. There are a few different ways to do this, but the most common way is to use an exchange.
An exchange is a platform that allows you to buy, sell, or trade cryptocurrencies. The most popular exchanges are Coinbase, Kraken, and Binance.
To buy a Bitcoin coin on an exchange, you will need to create an account and deposit funds into that account. Once your account is funded, you can then place an order to buy a Bitcoin coin.
Coinbase is one of the most popular exchanges and allows you to buy Bitcoin with a credit or debit card. Kraken is another popular exchange that allows you to buy Bitcoin with fiat currencies like USD, EUR, GBP, and CAD.
Binance is a newer exchange but has quickly become one of the most popular due to its low fees and wide variety of cryptocurrencies available for trading.
Once you have bought your Bitcoin coin, it will be stored in your account on the exchange. Most exchanges allow you to withdraw your Bitcoin to an external wallet where you control the private keys.
This is the recommended way to store your Bitcoin as it keeps your coins safe from hacks and theft.