@hummelav If you're thinking of buying a house, now is the time. Banks may offer you lower interest rates if you can show proof of salary.
If you are like me and trust yourself with a creditcard, aim for the highest, biggest, and request for credit limit increase every 2-3 months. I opted for Shopee points CC, and I enjoy a lot of discounts that really add-up when buying everyday items online. I bought my vehicle on my creditcard and that amounts to more Shopee points than I can even spend, but it saves me so much as well. For specifics, I spend RM35 /2weeks on my catfood. Retail would be RM55. Without points would be RM42. It adds up over time.
If you are a savvy investor who can beat banks, you can take out big personal loans to invest. Crypto is expecting another bullrun soon. I wouldn't recommend this unless you are someone with a finance background and really know what you are doing. Don't gamble. Not financial advice.
I would also suggest researching businesses and startups that you feel you would be able to handle if you are worried about salary when returning. 5 years is enough time to build a plan for your next steps.
Last, network with your Singaporeans. I myself have been enjoying an income from Singapore, but all the while been in Malaysia working remotely. Be friendly, even with the assholes. You never know who can open more doors for you.
I know this isn't directly the advice you're looking for, but it's just general. You're young, enjoy your money, put some aside for your future.