Investing in stocks and shares does have an element of risk, but because of this the rewards can be greater. Investors have to bear in mind that there is always a trade-off between risk and expected return - this is also true of dividends and growth.
The more risk you are willing to take the higher the potential return.
If you put your money in a building society savings account, there is a strong likelihood the society will stay in business and be able to pay your agreed (but usually low) interest at the end of the year.
If, on the other hand, you invest the money in a small company, you may make a significant profit as strong demand makes the share price rise - or you may lose everything if consumers shun the new product or some other mischance occurs.
Many people prefer to take a little more risk in order to invest directly in shares for the higher potential rewards. As long as the timescale is five years upwards, stock market returns are likely to be better than other forms of saving.
If you decide to invest in companies listed on the stock market you should try to estimate where the investment lies between the two extremes - low risk, low return, and high risk, high (potential) return.
If you are not comfortable with the level of risk, don’t go ahead, and in any case, don’t invest money you ultimately cannot afford to lose.