High rates of return are addictive and there is a fine line between investing and gambling.   

It can't/shouldn't - unless you have a partner you really trust or want to gamble. 

Lease 2 own exit is a gamble as an exit strategy too. 

This is like asking a casino-paid gambling consultant to help you beat the house - it's a conflict of interest as few buyers agents (who are also paid on commission) are truly motivated to negotiate themselves to a smaller sales commission.

Speculators buy without a positive return relying on historic appreciation records to support their gamble. 

The difference between 2005 and now, is that back in 2005 deals were bought at a massive negative amortization, as you stated and they were purchased solely as a gamble for appreciation.

Appreciate is a gamble.

It is more how I would suggest you invest based on what you said about risk earlier.I get bored easy and like to gamble. 

Roofstock is really interesting and I love the concept, the only problem I have with their site is much of their stock seems like it can be a gamble.

Since you are posting a link to your own company's website, your post is more like SPAM than information - regardless of whatever else you wrote.