Yes, anything can happen to a single person, which is the main trust issue here. How about FIMK association functioning as the backer? Registered association could and should do that non-profit (for legal purposes), any other legal issues? Do the rules of the FIMK association allow this? If no problems for the association, or users of the service provided by association (AFAIK there shouldn't be, as reporting rise of value of "investment" in cryptocurrency is the responsibility of the trader), as member of the association I would support this idea. Association would, if I'm not mistaken, also have the means ("war chest" and FIMKs and some euros from membership fees etc.) to back up the assets and it could solve the hen and egg problem by putting up both initial buy and and sell orders at days rate.
Which of all needed various currency accounts does the association have now at it's disposal?
Using AE for exchange is good idea, I have no problem with it - except that we need the service also in Finnish language, to begin with. Most importantly we need good and easy enough system to exchange Euro and FIMK ASAP. All other currencies are less important at this point of evolution.