For example, DraftKings (NASDAQ: DKNG), MicroStrategy (NASDAQ: MSTR), and Tesla (NASDAQ: TSLA) are up 66%, 97%, and 59%, respectively, so far this year. Here's why I can't see myself ever holding shares -- and why studying Warren Buffett, the Oracle of Omaha, leads me to believe he wouldn't either. The online sports betting site came public via special purpose acquisition company, or SPAC, in late 2019.