Although some of its citizens are not in favor of the decision, the El Salvador government already declared BTC as a legal tender. There are also news articles that says legislators in other countries are proposing to do the same. Before all that, Japan already recognized bitcoin as a payment method.

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Imagine if countries were to accept and view BTC as legal tender, there would be endless and limitless possibilities on its application.

But my question is, since it has been viewed as legal tender, isn't relatively risky to view it as legal tender especially that it is volatile on its price? Though BTC can be used as a currency in other services and products, seeing it as legal tender is a premature move to be honest.

Like what OP said, BTC is a store of value investment. The reason on why it is considered as currency is due to its anonymity value and nature.