What are you seeing out there in your market I actually minor in economics and an investor in Stock and FOREX (currency, basically like stock market but instead of companies, you invest in countries). 

I also play the FOREX market (currency, but instead of companies the whole country), that you have to get approved by banks since I control 1:400.

Your mix will vary depending on goals and risks.I had 50% in stocks over the past 10 years, and enjoyed the bull run.Now it is 70% in REI, 24% in equities/bonds/ETFs, 5% in Silver/Bullion, 1% crypto.

Laws and laws changing vs foreigners......think about all the foreigners who lost their property in Spain, Mexcio, and Venezuela.....law changes in Canada and Malaysia recently.Language and Customs.Lending/Currency ExchangeFACTA in the United States.It's just a start.

Certainty is currency. 

I'm currently a software engineer at Snapchat working on embedded systems and I also am a partner w/ some friends at a crypto fund doing ICO investing. 

And yes, there is a lot of paid top-10 garbage on the internet that has been put forth by various gold or cryptocurrency dealers. 

Personally, I started with general REI investing books which led to the following paths: rental property ownership, landlording, types of RE financing, understanding micro/macro economics, understanding currency etc.  

The currency exchange rots right now. 

Currency conversion dynamics can be a huge factor in foreign investment, one I had largely overlooked.Yes, that exchange rate does takes a big bite, but that's possibly where owner financing could be beneficial.