I think that they will first add Bitcoin and Ethereum, and then the rest of the coin, including Monero. I have never seen altcoins added first, and then Bitcoin ..
im talking not about exchange, im talking about payment method in ICO
I think that everything will be in the classic scenario for ICO: payment in Bitcoin and Ethereum. Sometimes, of course, it is possible to meet the possibility of payment in NEM and Ripple, but this is very rare.