Sabby recognized what it meant when Celgene Corporation (a $55B market cap company) got behind TNGN. There is no way this company should have a market cap of only $4.47M from what I can see. If we gave all the information of TNGN to your average OTC trader without showing them the PPS, what do you think they would estimate the market cap to be? Granted their estimates would be meaningless, but I think most would agree a lot higher than $4.47M (idiots on most of the other message boards I read want to value the damn ticker at ONVO's market cap).
Most OTC companies have fraud management, are insolvent, and only have value b/c of paid promotions (which all end the same way). One must be careful with every ticker - especially on the OTC - but this company is certainly not a fraud or a P&D.
Tickers that go up fast will always have bumps along the way, but this seems like a good hold to me (wish I read the news on July 1).