Trying to predict the bottom-out can be very difficult. It may not be for years to come.
If we have hyper inflation, that will occur before the market thinks about picking back up.
Then things like gas, food and automobiles may double/triple/quadruple in prices. You won't have any buying power with whatever money you are thinking about investing.
Gold, silver and commodities are a good way to store your value until then. You may triple the amount of dollars you have, but prices on everything may triple which means you won't have gained anything... but then at least you have something to invest if/when this mess is over.