Good answer!)
Multicurrency is a tricky question. Maybe solution is to follow initial hosted currency, e.g. if the bet started by BTC, all the next bets should be in BTC, and so on.
I understand that you have lack of financing. But what about some external sources? There are many ways to get money for development. For example, Augur gained 90 millions USD during ICO.
Any ICO plans for Betmoose? This way is much better then just donation button hidden somewhere on the site.
Pegging or locking to any particular crypto defeats the purpose of multi-currency; most users will likely place in BTC anyway, so the situation will not change - people with ETH or otherwise will be forced to convert to BTC via us (and we would have to charge a small % to do that for them), and they would get back BTC as a result.
Regarding ICO, we have not looked into that at this time; maybe in the future!