Vitalik is an advisor on this project, and the price of this moment I think is good. In Long turn, Omisego has a great potential growth in price, also the purpose of this project (unbank the bank) is useful and beneficial for both existing blockchain ecosystem and banking industry.
Is he really an advisor or he has just advocated that on the quality of the project and how valid the token utility is. I could be wrong but thats my understanding of Vitalik's previous comments