Making the moral distinction between "investors trying to get rich" vs "poor person trying to eacape inflation" is true but not relevant. The real comparison I'm making here is that both sets of users found out/are going to find out the hard way that they may be left holding the bag when they try to redeem their IOU.
I'm not trying to criticize EITHER "investor trying to get rich" OR "poor person trying to escape inflation". I'm just saying that both would have benefitted from purchasing a bearer-asset like Bitcoin instead of an IOU they were hoping a third party would redeem.