What is the safest investment for a beginner?

Safety depends on when you need the money, so this is two answers. For anything you need in the next couple of years, the safe places are a high-yield savings account, a money market fund, or short-term Treasury bills. They pay interest, they do not fall in value, and you can get at them quickly. Nothing in the stock market qualifies as safe on that time frame.

For money you can leave alone for five years or more, the safest way to be in stocks is a broad, low-cost index fund. It spreads your money across hundreds of companies so no single failure matters, and it has recovered from every decline in history. It is not safe in the sense of never dropping; it will fall 20 percent some years. It is safe in the sense that, held long enough, it has reliably come back and grown.

Between those, a target-date fund is a good one-decision option. It mixes stocks and bonds and gets more conservative automatically as your chosen year approaches. It is what most 401(k) plans default to for a reason.

What is not safe despite looking it: individual "blue chip" stocks (single companies still fail), high-dividend stocks bought for the yield alone, and anything promising steady returns well above what savings pay. The last one is the classic shape of a scam.