This ETF tracks the performance of the companies that make up the S&P 500, making this an attractive investing option for passive investors who are not concerned with beating the market, but rather are extremely content with receiving whatever the market return is, less the management expense ratio (MER) they will pay for access to this ETF.
Most financial experts will give the advice to never put all of one’s eggs in one basket, but when that basket tracks the overall market (and arguably the highest quality stocks in the market, or at least the largest), it can perhaps be the best and simplest way to invest over the long term.
It may be advisable to diversify further into fixed income (i.e. bonds) and alternative investments like real estate to truly hold a safe long term mix of assets. Keeping some liquidity on the sidelines at this point in time would also be advisable, in my opinion, as pretty much all markets look frothy at the moment.