Since February, Lana Denina has earned over $300,000 from selling her art as NFTs, or nonfungible tokens, on various platforms. But only a month earlier, she just began learning what they are.

At the time, "I didn't know anything about blockchain," the 24-year-old tells CNBC Make It. She started looking into it, and "I was mind blown," she says. "It was completely revolutionary."