Investing is not risk-free and investors seeking higher returns should be prepared to accept more risk. A higher risk level will typically experience bigger market ups and downs than a lower risk one, but over the long term (5 to 10+ years) a higher risk level should perform better.
If you need to access your money soon or feel that a portfolio that moves up and down a lot is not for you, then you may want to choose a lower risk level.
However, if you're investing for the long term and are comfortable with your investment balance moving up and down a lot, you may want to choose a higher risk level.
Your priority is to maximise investment returns. You are willing to accept the risk of substantial losses and significant movements up and down in the portfolio's value with the aim of achieving the highest possible growth.