Any person who is interested in this way of investing free funds can buy a bitcoin today. There is no need to go through a long and complicated registration and verification procedures, or to wait for a long time, confirming your data, in order to purchase. It is possible to buy a bitcoin or its part in several very simple ways.
1. ON EXCHANGE
There exist the so-called crypto-currencies exchanges where deals on purchase and sale of bitcoins and altcoins are made. There are enough of them to choose a suitable one considering convenience, fees and other parameters. See the list of exchanges.
2. AT THE EXCHANGE OFFICE
You can buy bitcoin using an electronic exchange office. Just like we change rubles to dollars, you can also exchange rubles to bitcoins. There are also a wide differs much in different systems. See the list of exchange offices.
It is possible to purchase bitcoin quite legally by organizing a real meeting with the seller. You can find such offers on forums and websites where there are people who are ready to sell you bitcoins for a certain fee. For example
4. IN THE BITCOIN ATM
Yes, now such ATMs similar to usual ATMs are already appearing in the world, there you can sell or buy bitcoin for cash. In Moscow, you can find several such machines, for example, here https://coinatmradar.com/country/226/bitcoin-atm-united-states/
5. VIA THE BROKER
There are brokerage and dealing companies that offer their services in buying crypto-currency and speculating on them. In fact, you will not get real bitcoin in your hands, but you can earn as if you bought it as an asset for investment.
As soon as there appear opportunities to buy bitcoin, we will expand this list. If you know another proven way to buy bitcoin, please share it in the comments.