Elon Musk, the richest person on the planet, currently holds three main types of cryptocurrency:

1. Dogecoin: He accepts it for selling merchandise. DOGE is his main focus and he is very fond of Shiba Inu dogs. He frequently tweets or mentions it.

He has also named the Office of Government Optimization after Doge.😁

2. Ethereum: He also holds Ethereum ETH but no one knows the exact amount.

3. Bitcoin: BTC is the main cryptocurrency that Elon holds according to Tesla's balance sheet. Currently, his company has approximately 700 million USD worth of bitcoin. Some he has sold to test liquidity.