I mean, the dev team is eventually going to get access to the BTC at the end of the crowdsale, at which point they could just steal it all.
Actually in most of the ICO who will have escrow in middle have certain terms that will prevent devs from just running away scamming after ICO period. They need to deliver what they have promised in start to be able to get 100% of ICO investment and payments are made in parts to devs so that they will not run away and keep delivering updates and what is in their whitepaper.