The Wisconsin Department of Financial Institutions (DFI) has issued an advisory reminding investors to be cautious when considering investing in three products recently making news: marijuana-related investments, binary options and digital currency.

As more jurisdictions clarify their legal definitions on the growth and use of medical and recreational marijuana, an increasing number of companies focused on the marijuana industry are seeking funds from investors.

A binary option contract is based on the investor’s prediction of an underlying security’s value at a predetermined date....