The way I do it, I buy Bitcoin through a safe exchange, such as Gemini.. once I have my Sats, (which is the lowest fractional part of a Bitcoin) I transfer them to my preferred wallet. Then I just sit on what I have, or what they call, HODL.. cause my goal is to have viable currency after the fiat system inevitably comes crashing down from its own stupidity.

HOWEVER, it is possible to buy some things with Sats (Part of Bitcoin)... About a few months back, I bought some old books from my younger brother using my Sats, that way, he had some of his own and I had books to give my students. As more individuals use it, as well as companies, it becomes more viable and secure.