I have $50-$60k in cash - what should I do with it?

Hi!

Looking at your situation, the entire 50-60K can be used in investments and making your capital grow. To invest a large amount, you must diversify well, so that the portfolio can earn a sufficient return with a lower risk associated. A robo-advisor will provide you with a diversified portfolio to invest in based on your risk appetite and the amount of capital that you invest.
I work at kristal.AI, and it's my passion to evaluate various upcoming investment opportunities.

Assuming you are working and have your emergency funds set aside (and the property paid off), I would recommend that you pick up some knowledge first. Your parents have been buying shares for you and you have a property in your name, that is a solid start, but one day you will have to manage your own portfolio and you will want to ensure that what was build for you stays intact as long as possible; there is a Chinese saying that "Wealth does not pass three generations"

There are plenty of resources available, and you can always consult an independent financial advisor for guidance and assistance in understanding the various options before you decide on how to allocate your money. You can even speak with your parents to understand their decisions as to why they bought certain shares for you; what better way to learn than to speak with the people who have been managing your portfolio all these years? Couple that with your own knowledge gained and you will find a strategy that's unique to you alone.

Spending a bit of time understanding your options is better than just trying to invest your funds immediately; if there's nothing suitable, your cash can act as a warchest waiting for the right opportunities, but at least you would have gained knowledge while examining the various options. When the opportunity arrives, you will be better prepared.

You will have to decide what you want your portfolio to do for you. Although you have not provided any figures, you do seem to have a portfolio that will set you on the path towards financial independence. If your stock portfolio is already sizeable, then you could potentially achieve a passive income equal to your expenses within a couple of decades, if not sooner. Coupled this with a diversification of your portfolio across both variable (UTs/ETFs/Bonds) and guaranteed asset classes (CPF/annuities), as well as the correct position sizing for each asset class and each holding in your portfolio; you can build multiple streams of income such that your needs will be taken care of for a lifetime, with sufficient flexibility in your portfolio to provide for more income for your wants.

Once your own portfolio is taken care of, you will want to look further beyond just yourself. Consider how your parents can also preserve their own wealth when it is passed on to you eventually, and how you can also ensure your own wealth will be passed on to the next generation; or even to start a foundation or a trust; the framework for this can be built with the assistance of an advisor. That will be at a later stage in your planning. Work on the basics of your own portfolio first.