Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

I'm 20 and starting to build up for my mortgage downpayment, where should I put my money for optimal growth?
You should never take advice from someone else in relation to a question like this. Who would you blame if things go wrong and you lose money or make less than your savings account. For this reason I will give you the same answer I gave to one of your previous similar questions: If you want higher returns you may have to take on more risk. From lowest returns (and usually lower risk) to higher returns (and usually higher risk), Bank savings accounts, term deposits, on-line savings accounts, offset accounts (if you have a mortgage), fixed interest eg. Bonds, property and stock markets.  If you want potentially higher returns then you can go for derivatives like options or CFDs, FX or Futures. These usually have higher risks again but as with any investments some risks can be partly managed. What ever you decide to do, get yourself educated first. Don't put any money down unless you know what your potential risks are and have a risk management strategy in place, especially if it is from advice provided by someone else. The first rule before starting any new investment is to understand what your potential risks are and have a plane to manage and reduce those risks.