My friend and I wanted to invest $10K, indeed OPTHERIUM did great job, marketing is awesome, but we decided to pass on this ICO due to red flags:

1. Company asking to send money to the US bank (PNC Bank) located at 1163 State Route 34, Aberdeen, NJ, 07747, but beneficiary located in Estonia. It is a small country, has border with Russia and well known as a laundry hub. Google it.
    
2. Beneficiary address in Estonia: K379 Rossikrantsi 210119 Talinn Estonia - But Google cannot find this address, by the way Google told me that it should be Tallinn not Talinn.
    If google cannot find address where beneficiary is located, it raises a huge red flag for us.

3. OPTHERIUM LAB is not registered in USA. It seems that as soon as money gets collected they will be transferred outside of USA, to Estonia.

I am not telling that this project is scam, but my friend and I are not comfortable to invest into this ICO.
Please do your own homework and research before investing.