The honest answer here is there is not much we can do about it, Angor is a Bitcoin based crowdfunding protocol projects using it should be estimating in Bitcoin. However there are ways around it 1. Arbitrage, a founder can agree with a 3rd party to sell a portion of the future released BTC milestone at a certain price 2. We have plans to add support for the liquid network and there one can use USDT on the same Bitcoin script language that the Angor protocol uses.