They probably should have spent that $150M reserve fund on pre-mining their own cryptocurrency (and then put it in reserve). That way at least the currency could float on its own terms with respect to the Salvadoran economy.

I think the trade-deficit between El Salvador and the rest of the world[0] will mean this is just a gimmick in the end.

[0] https://tradingeconomics.com/el-salvador/balance-of-trade