If you want to save money, invest in real estate. The price of homes tend to increase at the rate of inflation over long periods. In short periods you can even make a decent profit.
Other than that start investing... Forex or BTC if you want to trade actively. If not active, invest in some of these start up crypto businesses. Some of them are promising and easy to invest in. If they were regular start ups you would never have heard of them and probably wouldn't have access if you did. So take the opportunity to find some promising ICOs and other projects and take advantage.
Good luck
You kinda seem to have enumerated the best ways of losing money long term. You didn't mention gambling, but it is evidently not a long term way of losing money, for obvious reasons. Investing in real estate may be risky as hell, and in most cases is unless you buy home to live in it, but then it is not an investment in the strict sense of the word. In the first place you need a hefty capital of thousands of dollars to invest in real estate. You can take a loan but this alone makes such an investment even riskier. You expect that the price will rise in a few years? Okay with that, but remember you will have to pay a lot of monthly and annual charges including but not limited to property taxes, costs for repairs, maintenance, and who knows what else...

And you still may very well end up like this