Has anybody thought of this?
El Salvador is a small, very poor country (average monthly income = $365). And they are a
democracy. If you are an average citizen of El Salvador, you are probably thinking about the nice things you could get if your government sold all of that BTC at a huge profit (and yes, math: this isn't enough to make everybody there rich or something, but again, this country is a
democracy, so...).
I know El Salvador doesn't have a large percentage of the total Bitcoin supply, and them dumping it would only be a small bump on the market for a day or two, but I would reckon the psychological effects would be pretty huge.
Of course you could argue that they would want to keep their BTC as an investment, given how much money they have already made on it, but why not invest in some other digital currency that has potential gains of 10x more? In other words, what if El Salvador is gripped by...
mass-FOMO 
.
Something to think about...
So much there're higher institutions that have invested on bitcoin more than the El Salvador government so if by means El Salvador options out of investing on bitcoin of course bitcoin will still be bitcoin rather it'd only cause a bear fluctuation on the market which doesn't seem a strange move in the market.
Besides so you even think about how much values is bitcoins that are sold in every approach of the bullish seasons and yet the potential gravity of bitcoin at its uprises keep on going?
Let me apply you with this term or "soldier goes and soldier comes" "barracks remains the same". This simply means when entities like the El Salvador is out of the market, other enthusiasts are coming in and the potential values of bitcoin will keep on thrilling.
To talk about El Salvador diversifying their countries economy values and another coins and not just bitcoin is something you don't understand the economical view of the economists.
You don't just bump into every opportunities cause You've to consider the potential risks. So literally no other coins that's more reliable as bitcoin. This you must know.