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I have $100,000 in play money… what to do?
For any sort of investment you need to understand your risks first. If you're going to put money into the stock or bond market I would get a hold of Graham's "The Intelligent Investor" first, or any other solid value investing book, and educate yourself on what the risks are. I can't speak about real estate investing but I am sure there are plenty of books describing risks and benefits of that as well. I could see inflation/deflation having an effect there but I think the biggest impact on the landlord front is quality of life in the area you are renting and the quality of the tenant you can get. One crazy tenant and you will be driven mad yourself. As for starting a business, one thing I would like to say is that money does not automatically make money. The business should be driven by a product or service that you can provide first, and the backing seed capital second. In my opinion you will have to put energy and time worth much more than the 100k into a business over time to make it successful so the availability of capital should not be the driving decision here. Hope this helps more than it confuses.