Write the next sentence in the following story.

How to buy penny stocks without a broker
Be aware of the benefits of purchasing penny stocks.
Because penny shares can be purchased so cheaply, they represent an opportunity for enormous gains through high-volume purchases.
Be aware of the downside, too.
Penny stocks are not very liquid, meaning there may not be much demand for them, and as a stockholder, you could have trouble finding a buyer, should you want to sell your shares. In addition, the issuers of cheap stock may suffer from a weak market position and a fragile financial profile, making them risky investments.