I usually don't like talking about the past and money because asides the decision you made, you also have to look at the different contexts behind why you made that exact decision. So since I can't talk about the past, for me right now if I had a load of money stacked up right now, I would invest in real Estate, well because it's something I'm already somehow doing right now and I know how much more I can get from investing in real Estate especially in my country.
Also I will also invest in my assets, growing it at a pace that the money can sustain alongside the journey I am already on, because I also believe in returns and financial freedom it gives me overtime.
I think it is all about investments that will be sustainable for long, regardless of the situation of the economy. But just as you said, there are certain conditions we need to consider even in the past that can sustain the investment, but the real estate you mentioned would have been profitable because it has been one of the oldest investments that keeps giving profit in almost every part of the world, and it has been profitable even now. Gold investment should have been another good option in the past 25 years.
But for now, Bitcoin has joined them; it has been one of the most profitable investments in the last 10 years, and it will still be profitable in the future. And unlike the real estate and others, for Bitcoin investment, you can start with a little amount and keep accumulating your Bitcoin.