Many funds hold stakes in MicroStrategy, which behaves like Bitcoin’s wilder cousin. This may not be what you want in your retirement portfolio, our columnist says. Virtual Currency, Bitcoin (Currency), Stocks and Bonds, Pensions and Retirement Plans, Content Type: Service, Personal Finances, MicroStrategy Inc Many funds hold stakes in MicroStrategy, which behaves like Bitcoin’s wilder cousin. This may not be what you want in your retirement portfolio, our columnist says. NYT > Business