They are first countries make Bitcoin legal tender but they are not first countries where people use bitcoin. The hub of Bitcoin communities is in the USA, North America and Europe and it won't be shifted to other continents, countries too quickly.
Those two legal tender countries don't contribute too much on trading volume of Bitcoin as well as bitcoin transactions but we must appreciate their initiatives to make Bitcoin legal tender. By using legal tender stories from two nations, I want to say the same about Bitcoin friendly nations.
Asia isn't non-existent either. Take Singapore, for example, which is extremely BTC-friendly, or Thailand, where BTC is widely used.
Similarly, if you look at the number of Indian users who are involved in some way in BTC-related business (even if their regulations and laws are not specifically BTC-friendly, on the contrary), I don't think we should forget Asia. What's more, it's the biggest "market" in the world.
About El Salvador, what counts is not trading volume in my opinion. It doesn't really matter. What El Salvador brings, is confidence. By making BTC a legal tender, they gave a lot of people confidence that BTC was here to stay. Likewise, they're producing some excellent innovations in the BTC mining field, and I'm convinced that sooner or later, the lead they're taking will make them ideal advisors on how to run a business model that accepts Bitcoin on a great scale.
India's crypto-renaissance is underway. The Indian Bitcoin community has persevered and innovated despite legislative uncertainty.
El Salvador: trustworthy? Right on! Trading volume is immaterial. By reducing barriers and building confidence, cryptocurrencies can become mainstream. The cryptocurrency business was shaped by El Salvador's legalization of Bitcoin.
Bitcoin mining has also improved. They appear to be creating a "crypto masterclass" for everyone. Blockchain technology could make societies more open, efficient, and egalitarian.