In my mind I have zero doubt it'll reach $20-$30 some time in 2018, especially with the rebrand and main net launch in the summer. The partnerships they have now pretty much guarantee their network will be used (and I expect they will have more to announce), so VEN tokens (and THOR) will definitely have value. Unlike other alt coins I have zero worry about the legitimacy of VeChain, it doesn't get anymore legitimate than Jim Bryer joining as an official advisor on top of his company investing in VeChain.
I don't know if I will continue buying past ~$20, at least not with my own money. Definitely will put Thor generation towards getting more VEN, though I think by then the price of VEN will have gone up so much that it might not be easy/quick.
LOL don't fall for the temptation if you can't afford the risk.