Recently, ICOs of InsureX and Coindash have been hacked, due to the lack of security in their ICO websites. Devs of Opus should definitely invest in improving the security of the ICO website to prevent the potential loss induced by hacking.
I hope OPUS team will take lot security because already we have seen many hacking to the ICO websites. So I suggest the team should take care of the investors in this way you will release the products in time.