Many investors spend more time deciding what to invest in than thinking about why they’re investing in the first place. Should you buy US stocks or Singapore equities? Are bonds attractive again? Is artificial intelligence the next big investment opportunity? Is now the right time to invest? These questions matter, but they’re only part of the picture. The bigger question is whether your portfolio is evolving alongside your life. The investments that make sense when you’re 25 may no longer suit you at 45. As your income grows, your responsibilities increase and retirement looms closer, your financial priorities naturally change too. Rather than trying to build the “perfect” portfolio once and applying a one-size-fits-all approach through the years, it’s often more useful to think about investing decade by decade. Each stage of life has different goals. In your twenties, you’re laying foundations. In your thirties and forties, you’re building wealth while balancing family and...