A surprising percentage of high-net-worth individuals own crypto. And it’s not just high-profile tech titans in Silicon Valley. According to new Motley Fool research, a whopping 68% of American millionaires own cryptocurrency.

That raises an interesting question: Did they start buying crypto after they became self-made millionaires, as a way to further diversify their portfolio? Or did they use targeted crypto buys over an extended period of time to generate life-changing wealth?

Which cryptocurrencies are millionaires buying?

The two most popular cryptos, as might be expected, are Bitcoin (BTC +1.81%) and Ethereum (ETH +5.82%). Nearly 60% of crypto-owning millionaires hold Bitcoin, and 55% hold Ethereum. That’s not terribly surprising,…