Texan77, you are wrong to think that increased adoption of crypto currencies, in particular Bitcoin will tend to cause their prices denominated in dollars to go down.
The opposite is the case. Most crypto currencies have a limit of supply. In the case of Bitcoin that's 21 million coins. The more people or organisations hold and use Bitcoin the greater the demand for the limited supply and thus the price will increase in dollar terms.
As currencies move away from proof of work, which requires 'mining' the less power will be consumed in the creation of the tokens.
Right now, even proof of work coins such as Bitcoin are seeing changes as miners introduce new ways of managing power consumption. So, in the USA we are starting to see miners associating their output with flared gas - hitherto waste energy. Yes, El Salvador is using geothermal power as are miners in other parts of the world. The cost of energy is becoming less important.
In addition, I think you do not understand volatility or how it doesn't affect purchases made in crypto currencies and absolutely not the use case for countries that currently use the dollar in trade such as El Salvador.
I am sure that you have questions that can clarify your understanding. Please feel free to ask. I and others will try to help you.