If you're looking for someone to manage your money on your behalf then you'll need to invest in specific investment products offered by asset managers like Allan Gray. They offer managed funds into which you invest your money and the fund manager uses the pooled capital to invest in whichever products suit the nature of the fund. It could be an aggressive fund with large exposure to equities and little hedging on the downside, or it could be more balanced with small equities exposure, bond exposure, fixed asset exposure etc and hedged against the downside using other investment instruments.
The banks have asset management divisions but they are what are called "sell side" market players. The asset managers being "buy side" market players. One sells or facilitates trades, the other buys them as investments - put simply. So in other words, your bank can set up an account which facilitates your trades, so they take care of the buy/sell orders from execution to settlement point - but the decision is yours. If you're not financially educated then I'd suggest going the asset management route instead - let the fund manager determine the best investments, but speak to a financial advisor first (the fund managers have plenty of them and won't let you invest without consulting with one) as they are in a position to determine which investment products suit your needs...