I am wondering some ICO's accept only ETH. Some accepts BTC, ETH, LTC and other cryptocurrencies as well. Does accepting more currencies in ICO plays a roles in its success.
Also Ethereum's smart contract are built for accepting only ETH. How other ICO's are accepting multiple cryptocurrencies and pays tokens accordingly? Do they have to maintain a sheet of who pays in what currencies in a sheet and allocate tokens accordingly. It seems to be a hard manual process.
What is the need of accepting more cryptocurrency when the ones that are more reliable will do the job? These 3 coins you mentioned are still the only most reliable coin in the market for now that any project developer or merchant will focus more on.
Some projects dont even trust their fellow developers as regard their coin, because if they do like they trust these 3 coins, there is nothing really stopping them from accepting multiple crypto currencies, my own is for them to just make decisions that will simplify the process for end users of investors, whatever will make investors comfortable and safe is what they should be after.