question generator address for ico

[preevost]

startups for their ico to receive bitcoin on their wallet

let me explain, each investor who creates an account this generates an address which then return to the main address of the startup

I want to create an ico and show main address for all investors, but I think there will be a problem if investors want to invest only 100$ in bitcoin adress startup for example, the validation of their transaction could take several days, I have noticed that the current icos allows to generate an address and the validation is fast

and the same for ethereum, if you have information that interests.

Thank you for your help