This is very much ok,to keep little amount in high risk investment.Personally i would like to invest in agricltural produce as these are daily staple foods that are needed for human survival,Then to divest i would go into cryptocurency trading with very minimal amount of my earnings.It totally depends on your risk apetite for this. As a fresh grad with a stable job, you may opt for lower risk investments and build a nest egg. The goal is to have 6 months of expenses stashed away (You keep this accessible in case of emergency). And then invest the rest.
I like to follow a 80/20 rule. I invest 80% of my extra money in low risk options like Mutual funds, 20 in higher risk