Launching ICO requires lot of technical , marketing and block chain knowledge. Block chain developers which are rare to get on board helps to create website and create application to accepts payment in Crypto Currency.
Accepting payment in crypto currency like Bitcoin , Ethereum is pretty important over here since most of thee users of crypto world want to get pay the amount in concurrency and receive the other concurrency.
Apart from Block Chain team web developers and designers are required to put everything in fronted for users.
In ICO coins needs to be launch which will serve the purpose of Block Chain application and can be further traded in Crypto Exchanges. Coin development requires highly experience block chain developers