Hello @partitura. This is an interesting question. My understanding is, that the basic currency of Steem-Engine is backed up by real steem (as you have to load Steem into the system). If prices of other tokens go up there might be virtually more value within the steem-engine, but if it comes to selling only the number of steem that was uploaded into the engine can be retrieved. When every token is exchanged to Steem-pegged (sending its value down to 0) it can never be more than what has initially been uploaded into the system. Until Nixon changed it, the US Federal reserve (Steem-Engine in our case) had the number of dollars (the Tokens in our case) in circulation pegged to the exact amount of gold (steem in our case). Therefore I think Steem-Engine can not go bankrupt.