Bubble Proof?

[Kerry Hennessy]

What is the safest type of Real Estate investing? Who were the investors that still made money in the crash of 2008? I am new to this game and am hoping to be a passive investor doing buy and hold on property that cash flows. What are the market implications on a buy & hold investor that bets on cash flow not appreciation? Did these type of investors survive the last bubble burst? Is there something safer out there?

Sorry for the noob question but I guess this is the "starting out" forum