That's something you and your adviser need to talk about. Investments which offer a high return have a greater risk of losing value. You can see if a return is high or low by comparing it with what a bank fixed term deposit would offer. Ask your adviser about the risks in each different type of investment that they are thinking about recommending to you. Avoid investments advertised as 'no risk'.
All investments have risks.
Always discuss with your adviser the risks of losing money. Before you get a plan, ask your adviser to tell you the amount of risk they think you're willing to take. If they have a different understanding from you, you need to discuss that. Some people are born gamblers. Others don't want to consider anything riskier than a savings account.