Hello - I am not sure what this means?

"2 out of 3 multisignature  service from http://Coinbase.com is used.
The funds will be released upon successful launch of WAVES network and after the balances at the ICO site can be withdrawn to WAVES wallets addresses"

In plain and simple terms - if I invest in the ICO, can I pay my investment using my Coinbase account or does it have to come from my personal BTC wallet?

Thanks - pokeytex